Updated on 2024/11/24

写真a

 
KIKUCHI, Eiichi
 
Affiliation
Faculty of Science and Engineering
Job title
Professor Emeritus
Degree
Doctor of Engineering ( Waseda University )
Homepage URL
http://www.appchem.waseda.ac.jp/fm-jp/kikuch-j.htm

Research Experience

  • 1980
    -
    　

    - 早稲田大学 教授

  • 1980
    -
    　

    - Professor, Waseda University

  • 1975
    -
    1980

    Waseda University

  • 1975
    -
    1980

    Associate Professor, Waseda University

  • 1969
    -
    1975

    Waseda University

  • 1969
    -
    1975

    Research Assistant, Waseda University

  • 1972
    -
    1973

    研究員(カナダアルバータ大学)

  • 1972
    -
    1973

    Postdoctoral fellow, University of Alberta

▼display all

Education Background

  • 　
    -
    1969

    Waseda University  

  • 　
    -
    1969

    Waseda University   Graduate School, Division of Science and Engineering   Applied Chemistry  

  • 　
    -
    1964

    Waseda University   Faculty of Science and Engineering  

  • 　
    -
    1964

    Waseda Univrsity   Faculty of Science and Engineering   Department of Applied Chemistry  

Committee Memberships

  • 2006
    -
    　

    石油学会  会長

  • 2002
    -
    2003

    解媒学会  会長

  • 2000
    -
    2001

    ゼオライト学会  会長

  • 1999
    　
    　

    北海道大学大学院地球環境科学研究科 外部評価委員会 評価委員 1999 － 1999

  • 1997
    -
    1998

    日本化学会  理事

  • 1985
    -
    1996

    日本エネルギー学会(旧称燃料協会)  理事

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Professional Memberships

  • 　
    　
    　

    日本表面科学会

  • 　
    　
    　

    American Chemical Society(アメリカ化学会)

  • 　
    　
    　

    ゼオライト学会

  • 　
    　
    　

    化学工学会

  • 　
    　
    　

    日本エネルギー学会(旧称燃料協会)

  • 　
    　
    　

    解媒学会

  • 　
    　
    　

    石油学会

  • 　
    　
    　

    日本化学会

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Research Interests

  • 有機工業化学

  • 反応・分離工学

  • 触媒・化学プロセス

  • Catalysis and chemical processes

Awards

  • 石油学会賞

    1999  

  • ICＣ Distinguished Lectureship Award

    1998  

  • 触媒学会賞

    1996  

  • 触媒調製化学賞

    1993  

  • 燃料協会進歩賞

    1981  

  • 石油学会論文賞

    1978  

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Books and Other Publications

  • 脱硝触媒－自動車「二元機能触媒」

    触媒活用大事典  2004

  • ゼオライトを利用した機能複合化による触媒設計

    環境触媒ハンドブック（第5章3節）／エヌ・ティー・エス  2001

  • 石油化学プロセス（石油学会編）

    2001

  • Modification of Mordenite Catalyst for Selective Synthesis of 2,6-Diisopropylnaphthalene by Alkylation

    ACS Symposium Series／American Chemical Society  2000

  • Modification of Mordenite Catalyst for Selective Synthesis of 2,6-Diisopropylnaphthalene by Alkylation

    ACS Symposium Series／American Chemical Society  2000

  • 触媒機能の複合化による触媒設計

    季刊化学総説／日本化学会  1999

  • 環境触媒の今後の展望「環境触媒 実際と展望」

    共立出版  1997

  • 環境触媒の今後の展望

    環境触媒ー実際と展望／共立出版  1997

  • 新しい触媒化学

    三共出版  1988

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Works

  • 日本・サウジアラビア国際研究交流事業「高機能触媒技術研究」

    1991
    -
    1994

  • Japan-Saudi Arabia International Exchange Program of Research on High Performance Catalysts

    1991
    -
    1994

  • エネルギー重点領域研究(多様なエネルギーの利用)

    1987
    -
    1989

  • エネルギー特別研究

    1981
    -
    1986

  • 米国におけるCI化学研究開発状況に関する調査

    1980
    -
    　

Research Projects

  • メンブレンリアクター

  • 無機分離膜

  • 環境触媒化学

  • エネルギー変換化学

  • 不均一系触媒化学

  • 一酸化窒素の選択還元触媒

  • 水素透過型メンブレン触媒リアクター

  • 選択的水素透過膜

  • membrane reactors

  • Inorganic membranes

  • environmental catalysis

  • chemistry of energy transformation

  • Heterogeneous catalysis

  • Selective catalysts for reduction of nitric oxide

  • Hydrogen-permselective catalytic membrane reactor

  • Hydrogen-permselective membrane

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Misc

  • エタノール水蒸気改質反応用CoおよびNi触媒担体へのペロブスカイト型酸化物の適用

    浦崎 浩平, 石川 清宏, 関根 泰, 菊地 英一, 松方 正彦

    触媒   48 ( 2 ) 65 - 67  2006

    CiNii

  • Hydrogen production via steam-iron reaction using iron oxide modified with very small amounts of palladium and zirconia

    K Urasaki, N Tanimoto, T Hayashi, Y Sekine, E Kikuchi, M Matsukata

    APPLIED CATALYSIS A-GENERAL   288 ( 1-2 ) 143 - 148  2005.07

    　View Summary

    We investigated hydrogen production by the steam-iron reaction using iron oxide modified with very small amounts of palladium and/or zirconia at a temperature of 723 K and under atmospheric pressure. Reduction of iron oxide with hydrogen and oxidation of partially reduced iron oxide with steam (Fe3O4 + 4H(2) <-> 3Fe + 4H(2)O) were repeated in the range of reduction degree of 30-50 mol%. Changes in the weight of the samples were monitored using a tapered element oscillating microbalance (TEOM) to control the degree of reduction. Unmodified iron oxide caused significant deactivation due to sintering with increasing number of redox cycles. The addition of a very small amount (0.23 mol%) of palladium or zirconia onto the surface of the iron oxide enhanced the reduction and/or oxidation of the partially reduced iron oxide, which suppressed sintering. Palladium accelerated both the reduction and oxidation rates of partially reduced iron oxide, while zirconia increased only the oxidation rate. Addition of both palladium and zirconia together to the iron oxide resulted in marked enhancement of both reduction and oxidation. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Hydrogen production via steam-iron reaction using iron oxide modified with very small amounts of palladium and zirconia

    K Urasaki, N Tanimoto, T Hayashi, Y Sekine, E Kikuchi, M Matsukata

    APPLIED CATALYSIS A-GENERAL   288 ( 1-2 ) 143 - 148  2005.07

    　View Summary

    We investigated hydrogen production by the steam-iron reaction using iron oxide modified with very small amounts of palladium and/or zirconia at a temperature of 723 K and under atmospheric pressure. Reduction of iron oxide with hydrogen and oxidation of partially reduced iron oxide with steam (Fe3O4 + 4H(2) <-> 3Fe + 4H(2)O) were repeated in the range of reduction degree of 30-50 mol%. Changes in the weight of the samples were monitored using a tapered element oscillating microbalance (TEOM) to control the degree of reduction. Unmodified iron oxide caused significant deactivation due to sintering with increasing number of redox cycles. The addition of a very small amount (0.23 mol%) of palladium or zirconia onto the surface of the iron oxide enhanced the reduction and/or oxidation of the partially reduced iron oxide, which suppressed sintering. Palladium accelerated both the reduction and oxidation rates of partially reduced iron oxide, while zirconia increased only the oxidation rate. Addition of both palladium and zirconia together to the iron oxide resulted in marked enhancement of both reduction and oxidation. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Improving oxygen permeability in SrFeCo0.5Ox asymmetric membranes by modifying support-layer porous structure

    M Ikeguchi, K Ishii, Y Sekine, E Kikuchi, M Matsukata

    MATERIALS LETTERS   59 ( 11 ) 1356 - 1360  2005.05

    　View Summary

    Disk-type SrFeCo0.50Ox, asymmetric membranes were prepared for high-temperature oxygen separation using both a previously reported solid state technique in which ethyl cellulose is introduced and then removed by calcination to produce a porous support layer and a modified technique in which carbon fiber is added to the ethyl cellulose. The oxygen permeabilities of the resulting SrFeCo0.50Ox asymmetric membranes were measured at 973-1173 K. The addition of carbon fiber to ethyl cellulose resulted in the improvement of gas diffusivity in the porous support layer, which increased the flux of oxygen through the modified asymmetric membrane. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Catalytic activities and coking resistance of Ni/perovskites in steam reforming of methane

    K Urasaki, Y Sekine, S Kawabe, E Kikuchi, M Matsukata

    APPLIED CATALYSIS A-GENERAL   286 ( 1 ) 23 - 29  2005.05

    　View Summary

    Steam reforming of methane for the purpose of hydrogen production was performed using nickel catalysts supported on a variety of perovskites, including LaAlO3, LaFeO3, SrTiO3, BaTiO3, La0.4Ba0.6Co0.2Fe0.8O3-delta, to compare the catalytic activity and resistance to coking of these catalysts to those of the conventional Ni/alpha-Al2O3 catalyst. Ni/LaAlO3 and Ni/SrTiO3 showed high catalytic activities among the Ni/perovskites and longer-term stabilities than the conventional catalyst. Temperature programmed oxidation of carbon deposited on used catalysts revealed that inactive carbon species detected on Ni/alpha-Al2O3 were not formed in the case of Ni/LaAlO3. The results of temperature programmed reduction confirmed that consumption and recovery of the lattice oxygen in perovskites occurred during the reaction, and that the reducibility of perovskites had a great impact on the steam reforming activity. The lattice oxygen in perovskites is considered to play important roles in promoting the oxidation of CH, fragments adsorbed on metallic nickel. (c) 2005 Published by Elsevier B.V.

    DOI CiNii

  • Improving oxygen permeability in SrFeCo0.5Ox asymmetric membranes by modifying support-layer porous structure

    M Ikeguchi, K Ishii, Y Sekine, E Kikuchi, M Matsukata

    MATERIALS LETTERS   59 ( 11 ) 1356 - 1360  2005.05

    　View Summary

    Disk-type SrFeCo0.50Ox, asymmetric membranes were prepared for high-temperature oxygen separation using both a previously reported solid state technique in which ethyl cellulose is introduced and then removed by calcination to produce a porous support layer and a modified technique in which carbon fiber is added to the ethyl cellulose. The oxygen permeabilities of the resulting SrFeCo0.50Ox asymmetric membranes were measured at 973-1173 K. The addition of carbon fiber to ethyl cellulose resulted in the improvement of gas diffusivity in the porous support layer, which increased the flux of oxygen through the modified asymmetric membrane. (c) 2005 Elsevier B.V. All rights reserved.

    DOI CiNii

  • Catalytic activities and coking resistance of Ni/perovskites in steam reforming of methane

    K Urasaki, Y Sekine, S Kawabe, E Kikuchi, M Matsukata

    APPLIED CATALYSIS A-GENERAL   286 ( 1 ) 23 - 29  2005.05

    　View Summary

    Steam reforming of methane for the purpose of hydrogen production was performed using nickel catalysts supported on a variety of perovskites, including LaAlO3, LaFeO3, SrTiO3, BaTiO3, La0.4Ba0.6Co0.2Fe0.8O3-delta, to compare the catalytic activity and resistance to coking of these catalysts to those of the conventional Ni/alpha-Al2O3 catalyst. Ni/LaAlO3 and Ni/SrTiO3 showed high catalytic activities among the Ni/perovskites and longer-term stabilities than the conventional catalyst. Temperature programmed oxidation of carbon deposited on used catalysts revealed that inactive carbon species detected on Ni/alpha-Al2O3 were not formed in the case of Ni/LaAlO3. The results of temperature programmed reduction confirmed that consumption and recovery of the lattice oxygen in perovskites occurred during the reaction, and that the reducibility of perovskites had a great impact on the steam reforming activity. The lattice oxygen in perovskites is considered to play important roles in promoting the oxidation of CH, fragments adsorbed on metallic nickel. (c) 2005 Published by Elsevier B.V.

    DOI CiNii

  • Standardization of catalyst preparation using reference catalyst: ion exchange of mordenite type zeolite - 2. Origin of dealumination and recommended standard conditions

    N Katada, T Takeguchi, T Suzuki, T Fukushima, K Inagaki, S Tokunaga, H Shimada, K Sato, Y Oumi, T Sano, K Segawa, K Nakai, H Shoji, P Wu, T Tatsumi, T Komatsu, T Masuda, K Domen, E Yoda, JN Kondo, T Okuhara, T Kanai, M Niwa, M Ogura, M Matsukata, E Kikuchi, N Okazaki, M Takahashi, A Tada, S Tawada, Y Kubota, Y Sugi, Y Higashio, M Kamada, Y Kioka, K Yamamoto, T Shouji, S Satokawa, Y Arima, Y Okamoto, H Matsumoto

    APPLIED CATALYSIS A-GENERAL   283 ( 1-2 ) 75 - 84  2005.04

    　View Summary

    The undesired structural change of mordenite with Si/Al-2 = 15 during the ion exchange and during calcination from the sodium form into proton form, especially the dealumination after the calcination, was studied. The Si-29 NMR results clarified that calcination of the NH4-form mordenite with Si/Al-2 = 15 at > ca. 800 K, followed by the contact of proton-form sample with the atmosphere containing humidity, induced the dealumination. However, the samples carefully kept free from humidity after the heat treatment showed no dealumination or only a low degree of it. The Al-27 NMR and ammonia TPD results agreed with these findings. The origin of dealumination is thus considered to be the contact of the proton-form sample with humidity after the calcination. On the other hand, the dealumination was not observed after calcination at < 673 K. The H-1 NMR indicated that the ca. 1/3 of the ion-exchange sites were blocked by the ammonium cations after calcination at 673 K, suggesting that the dealumination was prevented by the ammonium cations. On the basis of these findings, a standard set of conditions in which one can safely prepare the proton-form zeolite with high quality is proposed. The recommended temperature for the ion exchange is room temperature, because it is high enough to exchange the ions in this case. The most important variable is the calcination temperature; it should be lower than 673 K in order to avoid the dealumination. These conditions were confirmed to yield zeolites with a high framework aluminum content and ordinary catalytic performance. (c) 2005 Elsevier B.V. All rights reserved.

    DOI

  • Standardization of catalyst preparation using reference catalyst: ion exchange of mordenite type zeolite - 1. Remarkable dealumination accompanying ion exchange

    N Katada, T Takeguchi, T Suzuki, T Fukushima, K Inagaki, S Tokunaga, H Shimada, K Sato, Y Oumi, T Sano, K Segawa, K Nakai, H Shoji, P Wu, T Tatsumi, T Komatsu, T Masuda, K Domen, E Yoda, JN Kondo, T Okuhara, Y Kageyama, M Niwa, M Ogura, M Matsukata, E Kikuchi, N Okazaki, M Takahashi, A Tada, S Tawada, Y Kubota, Y Sugi, Y Higashio, M Kamada, Y Kioka, K Yamamoto, T Shouji, Y Arima, Y Okamoto, H Matsumoto

    APPLIED CATALYSIS A-GENERAL   283 ( 1-2 ) 63 - 74  2005.04

    　View Summary

    A joint study was organized to establish a standard set of conditions for the ion exchange of zeolite from sodium into proton-form. The sodium-form mordenite with Si/Al-2 = ca. 15 was ion exchanged into an NH4-form, followed by calcination according to various recipes. Then various advanced techniques for characterization (ICP, TG, XPS, SEM, XRD, N-2 adsorption Si-29 and Al-27 NMR, benzene diffusion, IR of OH and adsorbed pyridine and CO, ammonia TPD) were applied. and some test reactions (cracking of cumene, isopropylation of biphenyl, oligomerization of propene and chichibabin condensation of acetaldehyde and ammonia into picoline) were conducted. The ion exchange (removal of sodium) proceeded as expected, but remarkable differences were observed in physicochemical and catalytic properties of the thus-prepared proton-form samples. Exceptionally high temperature (383 K) for the ion exchange resulted in the structural degradation, while most samples exchanged at 333-353 K maintained the crystallinity and pore volume. The use of NH4Cl slightly changed the crystal morphology. Extra-framework aluminum species was formed on most samples after calcination above 773 K. In contrast, calcination at 673 K maintained the framework aluminum. Therefore, the dealumination is considered to proceed after complete removal of ammonia from the ammonium-form zeolite. However, the proton-form zeolite was stable under dry conditions, so it is speculated that the dealumination was induced by the contact of the proton-form zeolite to atmosphere with humidity. The total and Bronsted acidity decreased with the dealumination, while Lewis acidity increased. On the other hand, rapid heating of the ammonium type zeolite caused narrowing of the micropores. These structural changes seriously affected the catalytic activities for various reactions. (c) 2005 Elsevier B.V. All rights reserved.

    DOI

  • Standardization of catalyst preparation using reference catalyst: ion exchange of mordenite type zeolite - 2. Origin of dealumination and recommended standard conditions

    N Katada, T Takeguchi, T Suzuki, T Fukushima, K Inagaki, S Tokunaga, H Shimada, K Sato, Y Oumi, T Sano, K Segawa, K Nakai, H Shoji, P Wu, T Tatsumi, T Komatsu, T Masuda, K Domen, E Yoda, JN Kondo, T Okuhara, T Kanai, M Niwa, M Ogura, M Matsukata, E Kikuchi, N Okazaki, M Takahashi, A Tada, S Tawada, Y Kubota, Y Sugi, Y Higashio, M Kamada, Y Kioka, K Yamamoto, T Shouji, S Satokawa, Y Arima, Y Okamoto, H Matsumoto

    APPLIED CATALYSIS A-GENERAL   283 ( 1-2 ) 75 - 84  2005.04

    　View Summary

    The undesired structural change of mordenite with Si/Al-2 = 15 during the ion exchange and during calcination from the sodium form into proton form, especially the dealumination after the calcination, was studied. The Si-29 NMR results clarified that calcination of the NH4-form mordenite with Si/Al-2 = 15 at > ca. 800 K, followed by the contact of proton-form sample with the atmosphere containing humidity, induced the dealumination. However, the samples carefully kept free from humidity after the heat treatment showed no dealumination or only a low degree of it. The Al-27 NMR and ammonia TPD results agreed with these findings. The origin of dealumination is thus considered to be the contact of the proton-form sample with humidity after the calcination. On the other hand, the dealumination was not observed after calcination at < 673 K. The H-1 NMR indicated that the ca. 1/3 of the ion-exchange sites were blocked by the ammonium cations after calcination at 673 K, suggesting that the dealumination was prevented by the ammonium cations. On the basis of these findings, a standard set of conditions in which one can safely prepare the proton-form zeolite with high quality is proposed. The recommended temperature for the ion exchange is room temperature, because it is high enough to exchange the ions in this case. The most important variable is the calcination temperature; it should be lower than 673 K in order to avoid the dealumination. These conditions were confirmed to yield zeolites with a high framework aluminum content and ordinary catalytic performance. (c) 2005 Elsevier B.V. All rights reserved.

    DOI

  • Standardization of catalyst preparation using reference catalyst: ion exchange of mordenite type zeolite - 1. Remarkable dealumination accompanying ion exchange

    N Katada, T Takeguchi, T Suzuki, T Fukushima, K Inagaki, S Tokunaga, H Shimada, K Sato, Y Oumi, T Sano, K Segawa, K Nakai, H Shoji, P Wu, T Tatsumi, T Komatsu, T Masuda, K Domen, E Yoda, JN Kondo, T Okuhara, Y Kageyama, M Niwa, M Ogura, M Matsukata, E Kikuchi, N Okazaki, M Takahashi, A Tada, S Tawada, Y Kubota, Y Sugi, Y Higashio, M Kamada, Y Kioka, K Yamamoto, T Shouji, Y Arima, Y Okamoto, H Matsumoto

    APPLIED CATALYSIS A-GENERAL   283 ( 1-2 ) 63 - 74  2005.04

    　View Summary

    A joint study was organized to establish a standard set of conditions for the ion exchange of zeolite from sodium into proton-form. The sodium-form mordenite with Si/Al-2 = ca. 15 was ion exchanged into an NH4-form, followed by calcination according to various recipes. Then various advanced techniques for characterization (ICP, TG, XPS, SEM, XRD, N-2 adsorption Si-29 and Al-27 NMR, benzene diffusion, IR of OH and adsorbed pyridine and CO, ammonia TPD) were applied. and some test reactions (cracking of cumene, isopropylation of biphenyl, oligomerization of propene and chichibabin condensation of acetaldehyde and ammonia into picoline) were conducted. The ion exchange (removal of sodium) proceeded as expected, but remarkable differences were observed in physicochemical and catalytic properties of the thus-prepared proton-form samples. Exceptionally high temperature (383 K) for the ion exchange resulted in the structural degradation, while most samples exchanged at 333-353 K maintained the crystallinity and pore volume. The use of NH4Cl slightly changed the crystal morphology. Extra-framework aluminum species was formed on most samples after calcination above 773 K. In contrast, calcination at 673 K maintained the framework aluminum. Therefore, the dealumination is considered to proceed after complete removal of ammonia from the ammonium-form zeolite. However, the proton-form zeolite was stable under dry conditions, so it is speculated that the dealumination was induced by the contact of the proton-form zeolite to atmosphere with humidity. The total and Bronsted acidity decreased with the dealumination, while Lewis acidity increased. On the other hand, rapid heating of the ammonium type zeolite caused narrowing of the micropores. These structural changes seriously affected the catalytic activities for various reactions. (c) 2005 Elsevier B.V. All rights reserved.

    DOI

  • Hydrogen Production from Biomass Ethanol at Ａmbient Ｔemperature with Ｎovel Ｄｉａｐｈｒａｇｍ Ｒｅａｃｔｏｒ

    SEKINE Yasushi, ASAI Shinjiro, URASAKI Kouhei, MATSUKATA Masahiko, KIKUCHI Eiichi, KADO Shigeru, HAGA Fumihiro

    Chem. Lett.   34 ( 5 ) 658 - 659  2005

    DOI CiNii

  • New evaluation method of carbonaceous structure on coal steam gasification

    Y Sekine, K Ishikawa, E Kikuchi, M Matsukata

    ENERGY & FUELS   19 ( 1 ) 326 - 327  2005.01

    DOI CiNii

  • A novel method for hydrogen production from liquid ethanol/water at room temperature

    Y Sekine, K Urasaki, S Asai, M Matsukata, E Kikuchi, S Kado

    CHEMICAL COMMUNICATIONS   ( 1 ) 78 - 79  2005

    　View Summary

    We demonstrated that non-catalytic ethanol steam reforming proceeds efficiently and selectively without coking at the conditions of room temperature and atmospheric pressure using low-energy pulsed (LEP) discharge in combination with carbon fiber electrodes.

    DOI PubMed CiNii

  • Effect of a Small Amount of Zirconia Additive on the Activity and Stability of Iron Oxide during Repeated Redox Cycles

    Chem. Lett.   34 ( 2 ) 230 - 231  2005

    DOI CiNii

  • 石炭外表面の親水・疎水度がカラム浮選成績に及ぼす影響

    日本エネルギー学会誌   84   918 - 923  2005

  • メタン水蒸気改質反応用Ni/perovskite触媒担体の還元性が反応に及ぼす影響

    触媒   47   409 - 411  2005

  • Hydrogen Production from Biomass Ethanol at Ａmbient Ｔemperature with Ｎovel Ｄｉａｐｈｒａｇｍ Ｒｅａｃｔｏｒ

    Chem. Lett.   34 ( 5 ) 658 - 659  2005

    DOI CiNii

  • New evaluation method of carbonaceous structure on coal steam gasification

    Y Sekine, K Ishikawa, E Kikuchi, M Matsukata

    ENERGY & FUELS   19 ( 1 ) 326 - 327  2005.01

    DOI CiNii

  • A novel method for hydrogen production from liquid ethanol/water at room temperature

    Y Sekine, K Urasaki, S Asai, M Matsukata, E Kikuchi, S Kado

    CHEMICAL COMMUNICATIONS   ( 1 ) 78 - 79  2005

    　View Summary

    We demonstrated that non-catalytic ethanol steam reforming proceeds efficiently and selectively without coking at the conditions of room temperature and atmospheric pressure using low-energy pulsed (LEP) discharge in combination with carbon fiber electrodes.

    DOI PubMed CiNii

  • Effect of a Small Amount of Zirconia Additive on the Activity and Stability of Iron Oxide during Repeated Redox Cycles

    Kohei Urasaki, Yasushi Sekine, Naoshi Tanimoto, Eri Tamura, Eiichi Kikuchi, Masahiko Matsukata

    Chem. Lett.   34 ( 2 ) 230 - 231  2005

    DOI CiNii

  • Synthesis of MCM-41-type mesoporous materials using filtrate of alkaline dissolution of ZSM-5 zeolite

    S Inagaki, M Ogura, T Inami, Y Sasaki, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   74 ( 1-3 ) 163 - 170  2004.09

    　View Summary

    MCM-41-type mesoporous materials possessing strong Bronsted acidity originated from ZSM-5 zeolite were synthesized by using soluble aluminosilicate species containing the fragments of the structure of ZSM-5 zeolite. The thermal stability of the mesoporous structure of the obtained mesoporous material was enhanced by the post-treatment with an ammonium aqueous solution. These results suggest an important role of alkalinity of slurries on the following two processes; (1) alkaline dissolution of ZSM-5 zeolite and (2) formation of mesoporous structure. These successive processes were efficiently improved by use of a continuous-flow reactor. The mesoporous material synthesized in the continuous-flow reactor catalyzed the cracking of cumene at 523 K, while a conventional Al-MCM-41 hardly catalyzed. The mesoporous material synthesized by using the filtrate of alkaline dissolution of ZSM-5 possessed a stronger Bronsted acidity than a conventional Al-MCM-41. (C) 2004 Elsevier Inc. All rights reserved.

    DOI CiNii

  • Synthesis of MCM-41-type mesoporous materials using filtrate of alkaline dissolution of ZSM-5 zeolite

    S Inagaki, M Ogura, T Inami, Y Sasaki, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   74 ( 1-3 ) 163 - 170  2004.09

    　View Summary

    MCM-41-type mesoporous materials possessing strong Bronsted acidity originated from ZSM-5 zeolite were synthesized by using soluble aluminosilicate species containing the fragments of the structure of ZSM-5 zeolite. The thermal stability of the mesoporous structure of the obtained mesoporous material was enhanced by the post-treatment with an ammonium aqueous solution. These results suggest an important role of alkalinity of slurries on the following two processes; (1) alkaline dissolution of ZSM-5 zeolite and (2) formation of mesoporous structure. These successive processes were efficiently improved by use of a continuous-flow reactor. The mesoporous material synthesized in the continuous-flow reactor catalyzed the cracking of cumene at 523 K, while a conventional Al-MCM-41 hardly catalyzed. The mesoporous material synthesized by using the filtrate of alkaline dissolution of ZSM-5 possessed a stronger Bronsted acidity than a conventional Al-MCM-41. (C) 2004 Elsevier Inc. All rights reserved.

    DOI CiNii

  • Textural and catalytic properties of MCM-22 zeolite crystallized by the vapor-phase transport method

    S Inagaki, K Kamino, M Hoshino, E Kikuchi, M Matsukata

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   77 ( 6 ) 1249 - 1254  2004.06

    　View Summary

    MCM-22 zeolite crystallized by the vapor-phase transport (VPT) method showed a higher shape-selectivity to p-xylene in the alkylation of toluene with methanol, compared with MCM-22 crystallized by the hydrothermally synthetic (HTS) method, because VPT-MCM-22 has a smaller external surface area and a smaller number of acid sites thereon than HTS-MCM-22. Such textural properties of VPT-MCM-22 are caused by the fact that the spherical particles of VPT-MCM-22 are composed of hexagonal plates as thin as 55 nm; they are larger than those of HTS-MCM-22, which are 30 nm thick. The acidic properties, characterized by NH3-TPD and FT-IR using a pyridine adsorption technique, showed no significant difference between VPT- and HTS-MCM-22, except for the acidity on the external surface.

    DOI CiNii

  • Textural and catalytic properties of MCM-22 zeolite crystallized by the vapor-phase transport method

    S Inagaki, K Kamino, M Hoshino, E Kikuchi, M Matsukata

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   77 ( 6 ) 1249 - 1254  2004.06

    　View Summary

    MCM-22 zeolite crystallized by the vapor-phase transport (VPT) method showed a higher shape-selectivity to p-xylene in the alkylation of toluene with methanol, compared with MCM-22 crystallized by the hydrothermally synthetic (HTS) method, because VPT-MCM-22 has a smaller external surface area and a smaller number of acid sites thereon than HTS-MCM-22. Such textural properties of VPT-MCM-22 are caused by the fact that the spherical particles of VPT-MCM-22 are composed of hexagonal plates as thin as 55 nm; they are larger than those of HTS-MCM-22, which are 30 nm thick. The acidic properties, characterized by NH3-TPD and FT-IR using a pyridine adsorption technique, showed no significant difference between VPT- and HTS-MCM-22, except for the acidity on the external surface.

    DOI CiNii

  • Non-equilibrium Pulsed Discharge: the Difinitive Technology for PEMFC-copatible Hydrogen Generators Based on Steam Reforming Reactions

    Energy and Fuels   18   455 - 459  2004

    DOI

  • Hydrovapothermal Conversion of Tetraethoxysilane Vapor to Polycrystalline Zeolite Layer by in situ Gelation

    Chem. Commun.     899 - 900  2004

  • Non-equilibrium Pulsed Discharge: the Difinitive Technology for PEMFC-copatible Hydrogen Generators Based on Steam Reforming Reactions

    Energy and Fuels   18   455 - 459  2004

    DOI

  • Hydrovapothermal Conversion of Tetraethoxysilane Vapor to Polycrystalline Zeolite Layer by in situ Gelation

    Chem. Commun.     899 - 900  2004

  • The control of phase and orientation in zeolite membranes by the secondary growth method

    G Li, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   62 ( 3 ) 211 - 220  2003.08

    　View Summary

    Mordenite and ZSM-5 seeds could grow on the surface of an asymmetric alpha-Al2O3 support using an identical organic-free aluminosilicate solution under the same hydrothermal conditions. It suggests that the phase of zeolite can be controlled by varying the type of seed. Continuous mordenite and ZSM-5 membranes were prepared by the secondary growth method using corresponding seeds under appropriate conditions. The water content in the secondary growth mixture strongly influenced the growth of zeolite crystals. ZSM-5 seeds grew at a smaller rate and showed a habit of thin hexagonal plate in a concentrated mixture, while the crystals with a habit of rectangular parallelepiped were formed from a diluted secondary growth mixture. ZSM-5 crystals had poor intergrowth in the former case, whereas the crystals were highly intergrown in the latter case. ZSM-5 crystals in either membrane have a random orientation. In contrast to ZSM-5 zeolite, the crystal orientation in the secondary grown mordenite membranes strongly depended on the water content in the secondary growth mixture. The crystals in the mordenite membrane developed in a diluted secondary growth mixture were oriented with the (1 5 0) face parallel to the support surface, whereas the crystals in the membrane grown in a concentrated mixture were oriented with the (0 0 2) face parallel to the support surface. These results suggest that the crystal orientation in mordenite membranes can be manipulated only by changing the water content in a secondary growth mixture. The formation of the preferred crystal orientation in the secondary grown mordenite membrane is discussed in terms of an "evolutionary selection" process. (C) 2003 Elsevier Inc. All rights reserved.

    DOI CiNii

  • The control of phase and orientation in zeolite membranes by the secondary growth method

    G Li, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   62 ( 3 ) 211 - 220  2003.08

    　View Summary

    Mordenite and ZSM-5 seeds could grow on the surface of an asymmetric alpha-Al2O3 support using an identical organic-free aluminosilicate solution under the same hydrothermal conditions. It suggests that the phase of zeolite can be controlled by varying the type of seed. Continuous mordenite and ZSM-5 membranes were prepared by the secondary growth method using corresponding seeds under appropriate conditions. The water content in the secondary growth mixture strongly influenced the growth of zeolite crystals. ZSM-5 seeds grew at a smaller rate and showed a habit of thin hexagonal plate in a concentrated mixture, while the crystals with a habit of rectangular parallelepiped were formed from a diluted secondary growth mixture. ZSM-5 crystals had poor intergrowth in the former case, whereas the crystals were highly intergrown in the latter case. ZSM-5 crystals in either membrane have a random orientation. In contrast to ZSM-5 zeolite, the crystal orientation in the secondary grown mordenite membranes strongly depended on the water content in the secondary growth mixture. The crystals in the mordenite membrane developed in a diluted secondary growth mixture were oriented with the (1 5 0) face parallel to the support surface, whereas the crystals in the membrane grown in a concentrated mixture were oriented with the (0 0 2) face parallel to the support surface. These results suggest that the crystal orientation in mordenite membranes can be manipulated only by changing the water content in a secondary growth mixture. The formation of the preferred crystal orientation in the secondary grown mordenite membrane is discussed in terms of an "evolutionary selection" process. (C) 2003 Elsevier Inc. All rights reserved.

    DOI CiNii

  • Effects of preparation method on oxygen permeation properties of SrFeCo0.5Ox membrane

    M Ikeguchi, Y Yoshino, K Kanie, M Nomura, E Kikuchi, M Matsukata

    SEPARATION AND PURIFICATION TECHNOLOGY   32 ( 1-3 ) 313 - 318  2003.07

    　View Summary

    It was investigated that the effects of preparation methods and conditions for SrFeCo0.5Ox dense membrane on their oxygen permeability. Three different methods, a solid-state reaction method, an evaporation-to-dryness method, and a combined citrate and EDTA complexing method, were applied for the preparation of parent powder. The oxygen flux through membrane at 900 degreesC was increased in the order listed above. The oxygen flux could be greatly improved by repeated calcination and grinding of parent powder. The membrane sintered at a temperature as high as 1200 degreesC showed a higher oxygen flux (0.22 cm(3) (STP)/cm(2) min). (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI

  • Separation of water-acetic acid mixtures by pervaporation using a thin mordenite membrane

    G Li, E Kikuchi, M Matsukata

    SEPARATION AND PURIFICATION TECHNOLOGY   32 ( 1-3 ) 199 - 206  2003.07

    　View Summary

    Mordenite membranes have been prepared on the outer surface of a porous a-alumina tube by seed-assisted crystallization. The kind of silica source was found to have significant influence on the microstructure of the membrane grown on the seeded support. Highly water-selective mordenite membranes were prepared with crystallization time as short as 2-4 h at 180 degreesC. The dehydration of acetic acid by pervaporation was investigated using these thin membranes as functions of temperature and feed concentration. The separation mechanism is discussed. (C) 2003 Published by Elsevier Science B.V.

    DOI

  • A study on the pervaporation of water-acetic acid mixtures through ZSM-5 zeolite membranes

    G Li, E Kikuchi, M Matsukata

    JOURNAL OF MEMBRANE SCIENCE   218 ( 1-2 ) 185 - 194  2003.07

    　View Summary

    A study was carried out on the pervaporation of water from water-acetic acid mixtures through tubular ZSM-5 zeolite membranes. ZSM-5 zeolite membranes were prepared on the outer surface of a porous a-alumina tube by the seed-assisted crystallization method in the absence of organic templates. It was observed that water preferentially permeated with selectivities higher than the selectivity based on the vapor-liquid equilibrium in the entire range of acetic acid concentration. The separation mechanism of water through ZSM-5 zeolite membranes was discussed and compared with that through mordenite membranes. It was found that the permeability coefficients of both water and acetic acid decreased with increasing temperature, although the pervaporation fluxes of both water and acetic acid increased. As a result, it was concluded that the increase in the pervaporation flux with temperature was due to the increase in the driving force in terms of transmembrane partial vapor pressure difference with temperature. According to the mechanism proposed herein, a study was also directed to modify as-synthesized membranes for the improvement in their pervaporation performance. It was observed that both the water flux and the separation factor were increased through a membrane treated in alkaline solution under appropriate conditions. (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI CiNii

  • Effects of preparation method on oxygen permeation properties of SrFeCo0.5Ox membrane

    M Ikeguchi, Y Yoshino, K Kanie, M Nomura, E Kikuchi, M Matsukata

    SEPARATION AND PURIFICATION TECHNOLOGY   32 ( 1-3 ) 313 - 318  2003.07

    　View Summary

    It was investigated that the effects of preparation methods and conditions for SrFeCo0.5Ox dense membrane on their oxygen permeability. Three different methods, a solid-state reaction method, an evaporation-to-dryness method, and a combined citrate and EDTA complexing method, were applied for the preparation of parent powder. The oxygen flux through membrane at 900 degreesC was increased in the order listed above. The oxygen flux could be greatly improved by repeated calcination and grinding of parent powder. The membrane sintered at a temperature as high as 1200 degreesC showed a higher oxygen flux (0.22 cm(3) (STP)/cm(2) min). (C) 2003 Elsevier Science B.V. All rights reserved.

    DOI

  • Separation of water-acetic acid mixtures by pervaporation using a thin mordenite membrane

    G Li, E Kikuchi, M Matsukata

    SEPARATION AND PURIFICATION TECHNOLOGY   32 ( 1-3 ) 199 - 206  2003.07

    　View Summary

    Mordenite membranes have been prepared on the outer surface of a porous a-alumina tube by seed-assisted crystallization. The kind of silica source was found to have significant influence on the microstructure of the membrane grown on the seeded support. Highly water-selective mordenite membranes were prepared with crystallization time as short as 2-4 h at 180 degreesC. The dehydration of acetic acid by pervaporation was investigated using these thin membranes as functions of temperature and feed concentration. The separation mechanism is discussed. (C) 2003 Published by Elsevier Science B.V.

    DOI

  • ZSM-5 zeolite membranes prepared from a clear template-free solution

    G Li, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   60 ( 1-3 ) 225 - 235  2003.06

    　View Summary

    Template-free nanosized ZSM-5 seeds were prepared from commercially available ZSM-5 powder. By use of these seeds, thin and hydrophilic ZSM-5 zeolite membranes were prepared on the outer surface of a porous a-alumina tube in a clear solution free from organic template. The membranes showed high thermal stability to withstand pretreatment at 400 degreesC, At 270 degreesC, the ideal selectivities for H-2/i-butane and N-2/SF6 were 61 and 20, respectively. The membrane was effective to separate butane isomers at high temperatures. The maximum of the n/i-butane ideal selectivity was 36 at 300 degreesC. The separation factors for a 50/50 n/i-butane mixture were as high as 13 in the temperature range from 300 to 400 degreesC. (C) 2003 Elsevier Science Inc. All rights reserved.

    DOI CiNii

  • ZSM-5 zeolite membranes prepared from a clear template-free solution

    G Li, E Kikuchi, M Matsukata

    MICROPOROUS AND MESOPOROUS MATERIALS   60 ( 1-3 ) 225 - 235  2003.06

    　View Summary

    Template-free nanosized ZSM-5 seeds were prepared from commercially available ZSM-5 powder. By use of these seeds, thin and hydrophilic ZSM-5 zeolite membranes were prepared on the outer surface of a porous a-alumina tube in a clear solution free from organic template. The membranes showed high thermal stability to withstand pretreatment at 400 degreesC, At 270 degreesC, the ideal selectivities for H-2/i-butane and N-2/SF6 were 61 and 20, respectively. The membrane was effective to separate butane isomers at high temperatures. The maximum of the n/i-butane ideal selectivity was 36 at 300 degreesC. The separation factors for a 50/50 n/i-butane mixture were as high as 13 in the temperature range from 300 to 400 degreesC. (C) 2003 Elsevier Science Inc. All rights reserved.

    DOI CiNii

  • Selective Deposition of Pd on Porous Alumina Support Using Supercritical CO2

    Mat. Res. Soc. Symp. Proc.   752   265 - 270  2003

  • Steam Reforming of Methanol on Ni/Al2O3 Catalyst in a Pd-membrane Reactor

    菊地 英一, 河部 正, 松方 正彦

    J. Jpn Petrol. Inst.   46 ( 2 ) 93 - 98  2003

    DOI CiNii

  • Hydroisomerization of Tetralin on Zeolite Beta: Influence of Crystal Size

    Stud. Surf. Sci. Catal.   145   219 - 222  2003

  • Trace element behavior on coal combustion

    12th ICCS    2003

  • The behavior of trace Elements from High Temperature Coal Combustion Process

    ACS 225th    2003

  • Steam Reforming of Hydrocarbons and Alcohols Using Non-equilibrium Pulsed Discharge

    ISPC 16    2003

  • Selective Oxidation of Ethylene-Glycol by Active Carbon Catalyst

    GSCTOKYO2003    2003

  • Preparation of asymmetric ceramic membranes for oxygen permeation with slurries

    NAMS 2003    2003

  • Non-equilibrium Pulsed Discharge; Definitive Technology for PEMFC-compatibleH2 Generators

    GSCTOKYO2003    2003

  • Hydrogen-Butane Separation Through MFI-type Zeolite Membrane Grown by a Secondary Growth Method

    ACS 225th    2003

  • Effect of Water Adsorption on Permeation Properties of MFI-type Zeolite Membrane Produced by in-situ Crystallization

    ACS 225th    2003

  • Effect of Pd on the activity of Fe-K mixed oxide catalyst for dehydrogenation of ethylbenzene

    APCAT3    2003

  • Development of Liquid Fuel Reformer Using Low Energy Pulsed Discharge at Room Temperature

    ISPC 16    2003

  • Characterization of gas phase reaction with pulsed discharge under atmospheric pressure

    FLTPD-V    2003

  • Behavior of coal minerals on steam gasification of coal char

    The 8th Japan China Symposium on Coal and C1 Chemistry    2003

  • Ash Rejection Behavior on Continuous Column Flotation Process

    ACS 225th    2003

  • 触媒研究の現状と将来動向：水素透過膜による触媒反応の高効率化と夢の難反応の実現

    触媒技術の動向と展望／触媒学会   p.4-13  2003

  • 低エネルギーパルス放電を用いた水素製造プロセス

    ケミカルエンジニアリング   12, 25-33  2003

  • Selective Deposition of Pd on Porous Alumina Support Using Supercritical CO2

    Mat. Res. Soc. Symp. Proc.   752   265 - 270  2003

  • Steam Reforming of Methanol on Ni/Al2O3 Catalyst in a Pd-membrane Reactor

    Eiichi KIKUCHI, Shou KAWABE, Masahiko MATSUKATA

    J. Jpn Petrol. Inst.   46 ( 2 ) 93 - 98  2003

    DOI CiNii

  • A Study on the Pervaporation of Water-Acetic Acid Mixtures through ZSM-5 Zeolite Membranes

    J. Membrane Sci.   218 ( 1/2 ) 185 - 194  2003

    DOI CiNii

  • Hydroisomerization of Tetralin on Zeolite Beta: Influence of Crystal Size

    Stud. Surf. Sci. Catal.   145   219 - 222  2003

  • Trace element behavior on coal combustion

    12th ICCS    2003

  • The behavior of trace Elements from High Temperature Coal Combustion Process

    ACS 225th    2003

  • Steam Reforming of Hydrocarbons and Alcohols Using Non-equilibrium Pulsed Discharge

    ISPC 16    2003

  • Selective Oxidation of Ethylene-Glycol by Active Carbon Catalyst

    GSCTOKYO2003    2003

  • Preparation of asymmetric ceramic membranes for oxygen permeation with slurries

    NAMS 2003    2003

  • Non-equilibrium Pulsed Discharge; Definitive Technology for PEMFC-compatibleH2 Generators

    GSCTOKYO2003    2003

  • Hydrogen-Butane Separation Through MFI-type Zeolite Membrane Grown by a Secondary Growth Method

    ACS 225th    2003

  • Effect of Water Adsorption on Permeation Properties of MFI-type Zeolite Membrane Produced by in-situ Crystallization

    ACS 225th    2003

  • Effect of Pd on the activity of Fe-K mixed oxide catalyst for dehydrogenation of ethylbenzene

    APCAT3    2003

  • Development of Liquid Fuel Reformer Using Low Energy Pulsed Discharge at Room Temperature

    ISPC 16    2003

  • Characterization of gas phase reaction with pulsed discharge under atmospheric pressure

    FLTPD-V    2003

  • Behavior of coal minerals on steam gasification of coal char

    The 8th Japan China Symposium on Coal and C1 Chemistry    2003

  • Ash Rejection Behavior on Continuous Column Flotation Process

    ACS 225th    2003

  • Crystallization behavior of zeolite beta during steam-assisted crystallization of dry gel

    M Matsukata, T Osaki, M Ogura, E Kikuchi

    MICROPOROUS AND MESOPOROUS MATERIALS   56 ( 1 ) 1 - 10  2002.10

    　View Summary

    Zeolite beta with SiO2/Al2O3 ratios from 30 to 730 was synthesized by a steam-assisted crystallization method, and the crystallized products obtained within 24 h were characterized by means of chemical analyses, XRD, FE-SEM, Si-29- MAS NMR, N-2 adsorption, and temperature-programmed decomposition of tetraethylammonium cation occluded in the micropores of zeolite beta. Based on these results, the crystallization mechanism is discussed herein. It was found that agglomerates of nano-particles were formed from a dry gel before the development of a periodical structure in a long-range order, which can be detected by XRD. After several hours of crystallization, morphological changes in nano-particle agglomerates proceeded to give highly crystalline zeolite beta. (C) 2002 Elsevier Science Inc. All rights reserved.

    DOI

  • Crystallization behavior of zeolite beta during steam-assited crystallization of dry gel

    M. Matsukata, T. Osaki, M. Ogura, E. Kikuchi

    Microporous and Mesoporous Materials   56 ( 1 ) 1 - 10  2002.10

    　View Summary

    Zeolite beta with SiO2/Al2O3 ratios from 30 to 730 was synthesized by a steam-assisted crystallization method, and the crystallized products obtained within 24 h were characterized by means of chemical analyses, XRD, FE-SEM, 29Si-MAS NMR, N2 adsorption, and temperature-programmed decomposition of tetraethylammonium cation occluded in the micropores of zeolite beta. Based on these results, the crystallization mechanism is discussed herein. It was found that agglomerates of nano-particles were formed from a dry gel before the development of a periodical structure in a long-range order, which can be detected by XRD. After several hours of crystallization, morphological changes in nano-particle agglomerates proceeded to give highly crystalline zeolite beta. © 2002 Elsevier Science Inc. All rights reserved.

    DOI

  • Co Cation Effects on Activity and Stability of Isolated Pd(II) Cations in Zeolite Matrices for Selective Catalytic Reduction of Nitric Oxide with Methane

    OGURA M, KAGE S, SHIMOJO T, OBA J, HAYASHI M, MATSUKATA M, KIKUCHI E

    J. Catal.   211 ( 1 ) 75 - 84  2002

    DOI CiNii

  • Synthesis of MCM-22 Zeolite by the Vapor-phase Transport Method

    Stud. Surf. Sci. Catal.   142   53 - 60  2002

  • Co Cation Effects on Activity and Stability of Isolated Pd(II) Cations in Zeolite Matrices for Selective Catalytic Reduction of Nitric Oxide with Methane

    J. Catal.   211 ( 1 ) 75 - 84  2002

    DOI CiNii

  • Synthesis of MCM-22 Zeolite by the Vapor-phase Transport Method

    Stud. Surf. Sci. Catal.   142   53 - 60  2002

  • Quantitative analyses for TEA(+) and Na+ contents in zeolite beta with a wide range of Si/2Al ratio

    M Matsukata, M Ogura, T Osaki, E Kikuchi, A Mitra

    MICROPOROUS AND MESOPOROUS MATERIALS   48 ( 1-3 ) 23 - 29  2001.11

    　View Summary

    Beta zeolites with a wide range of Si/2Al ratios from 7 to infinity were synthesized by steam-assisted crystallization method. X-ray diffraction, FE-SEM, and MASNMR studies confirmed the formation of highly crystalline zeolite beta and Al incorporation in the framework under various conditions by the SAC method at temperatures ranging from 373 to 438 K. Na+ and TEA(+) contents occluded in micropores of beta zeolite were determined. Quantitative knowledge on such occluded cations gave great insight on understanding crystallization mechanism of beta. (C) 2001 Published by Elsevier Science B.V.

    DOI CiNii

  • Synthesis of EMT zeolite by a steam-assisted crystallization method using crown ether as a structure-directing agent

    M Matsukata, K Kizu, M Ogura, E Kikuchi

    CRYSTAL GROWTH & DESIGN   1 ( 6 ) 509 - 516  2001.11

    　View Summary

    A high-silica hexagonal faujasite EMT was crystallized by a steam-assisted crystallization (SAC) method using a crown ether of 1,4,7,10,13,16-hexaoxacyclooctadecane, 18-crown-6, as a structure-directing agent. The growth mechanism of EMT by SAC is quite different from that of EMT by the conventional hydrothermal synthetic method, in which layer-by-layer growth occurs. Another characteristic of SAC is that nanoparticles fuse and the surface of the dry gel is rearranged, resulting in a distinct hexagonal shape for the EMT crystals. Sodium content must be strictly defined when the SAC method is used, and the crystallization temperature must be kept below 408 K to keep the crown ether in the dry gel to obtain a pure phase of EMT.

    DOI

  • Quantitative analyses for TEA(+) and Na+ contents in zeolite beta with a wide range of Si/2Al ratio

    M Matsukata, M Ogura, T Osaki, E Kikuchi, A Mitra

    MICROPOROUS AND MESOPOROUS MATERIALS   48 ( 1-3 ) 23 - 29  2001.11

    　View Summary

    Beta zeolites with a wide range of Si/2Al ratios from 7 to infinity were synthesized by steam-assisted crystallization method. X-ray diffraction, FE-SEM, and MASNMR studies confirmed the formation of highly crystalline zeolite beta and Al incorporation in the framework under various conditions by the SAC method at temperatures ranging from 373 to 438 K. Na+ and TEA(+) contents occluded in micropores of beta zeolite were determined. Quantitative knowledge on such occluded cations gave great insight on understanding crystallization mechanism of beta. (C) 2001 Published by Elsevier Science B.V.

    DOI CiNii

  • Effect of NH+ 4 Exchange on Hydrophobicity and Catalytic Properties of Al-Free Ti-Si-beta Zeolite

    Masaru Ogura, Shin-Ichi Nakata, Eiichi Kikuchi, Masahiko Matsukata

    Journal of Catalysis   199 ( 1 ) 41 - 47  2001.04

    　View Summary

    Al-free Ti-Si-beta was synthesized by a steam-assisted crystallization (SAC) method using tetraethylammonium hydroxide as a structure-directing agent. It was noted that Na in a parent gel was essential for synthesizing highly crystalline Ti-Si-beta by means of the SAC method. An absorption band at 225 nm, assigned to isolated Ti species, and another band at around 270 nm appeared in the UV spectra of the Ti-Si-beta. The latter absorption band decreased upon ion exchange of as-synthesized materials with 1 M aqueous NH4NO3 solution, and this treatment did not change the SiO2/TiO2 molar ratio in Ti-Si-beta. The Q3 signal in the 29Si-NMR spectrum almost disappeared and the amount of H2O adsorbed decreased due to the NH+ 4 exchange of Ti-Si-beta. The NH+ 4 exchange resulted in a higher catalytic activity of the zeolite for cyclohexene epoxidation with H2O2 and a high selectivity toward epoxide compared with the H2SO4-treated Ti-Si-beta and Al-containing Ti-beta samples prepared in this study. Summarizing these results, the NH+ 4 exchange of Ti-Si-beta zeolite is found to induce a hydrophobic environment around Ti sites without detitanation from the zeolite frame-work. © 2001 Academic Press.

    DOI CiNii

  • Effect of NH4+ exchange on hydrophobicity and catalytic properties of Al-free Ti-Si-beta zeolite

    M Ogura, S Nakata, E Kikuchi, M Matsukata

    JOURNAL OF CATALYSIS   199 ( 1 ) 41 - 47  2001.04

    　View Summary

    Al-free Ti-Si-beta was synthesized by a steam-assisted crystallization (SAC) method using tetraethylammonium hydroxide as a structure-directing agent. It was noted that Na in a parent gel was essential for synthesizing highly crystalline Ti-Si-beta by means of the SAC method. An absorption band at 225 nm, assigned to isolated Ti species, and another band at around 270 nm appeared in the UV spectra of the Ti-Si-beta. The latter absorption band decreased upon ion exchange of as-synthesized materials with 1 M aqueous NH4NO3 solution, and this treatment did not change the SiO2/TiO2 molar ratio in Ti-Si-beta. The Q(3) signal in the Si-29-NMR spectrum almost disappeared and the amount of H2O adsorbed decreased due to the NH4+ exchange of Ti-Si-beta. The NH4+ exchange resulted in a higher catalytic activity of the zeolite far cyclohexene epoxidation with H2O2 and a high selectivity toward epoxide compared with the H2SO4-treated Ti-Si-beta and AI-containing Ti-beta samples prepared in this study. Summarizing these results, the NH4+ exchange of Ti-Si-beta zeolite is found to induce a hydrophobic environment around Ti sites without detitanation from the zeolite framework. (C) 2001 Academic Press.

    DOI CiNii

  • Alkali treatment technique ? new method for modification of structural and acid-catalytic properties of ZSM-5 zeolites

    Appl. Catal.   A219, 33  2001

    DOI

  • Novel organic-vycor glass composite membrane having Si-C bonds

    NOMURA M, MINETA Y, YAMAGUCHI N, KIKUCHI E, FUKUNAGA K, NISHIYAMA N, UEYAMA K, MATSUKATA M

    J. Chem. Eng. Japan   34 ( 6 ) 731 - 736  2001

    DOI

  • Separation of Hydrogen from Gas Mixtures Using Supported Platinum-group Metal Membranes(共著)

    UEMIYA S, KATO W, UYAMA A, KAJIWARA M, KOJIMA T, KIKUCHI E

    Separation & Purification Technology   22/23 ( 1/3 ) 309 - 317  2001

    DOI CiNii

  • Influence of Nano-particle Agglomeration on the Catalytic Properties of MFI Zeolite

    Stud. Surf. Sci. Catal.   135   566 - 572  2001

  • Growth of Oriented Mordenite Membranes on Porous a-Al2O3 Support

    Stud. Surf. Sci. Catal.   135   3151 - 3159  2001

  • MFI Zeolite with Uniform Mesopores Created by Alkali Treatment

    Stud. Surf. Sci. Catal.   135   1820 - 1827  2001

  • Synthesis of Msoporous Materials Using Filtrate of Alkali Treatment of MFI Zeolite

    Stud. Surf. Sci. Catal.   135   1290 - 1297  2001

  • ゼオライトに担持された金属カチオンの触媒特性‐HC-SCRを反応例とした眺望

    ゼオライト   18;89  2001

    DOI

  • 21世紀のゼオライト学会への期待

    ゼオライト   18(1);1  2001

  • Alkali treatment technique ? new method for modification of structural and acid-catalytic properties of ZSM-5 zeolites

    Appl. Catal.   A219, 33  2001

    DOI

  • Novel organic-vycor glass composite membrane having Si-C bonds

    J. Chem. Eng. Japan   34 ( 6 ) 731 - 736  2001

    DOI

  • Separation of Hydrogen from Gas Mixtures Using Supported Platinum-group Metal Membranes(共著)

    Separation & Purification Technology   22/23 ( 1/3 ) 309 - 317  2001

    DOI CiNii

  • Synthesis of EMT Zeolite by a Steam-assisted Crystallization Method Using Crown Ether as a Structure-directing Agent

    Crystal Growth & Design   2001   509 - 516  2001

    DOI

  • Influence of Nano-particle Agglomeration on the Catalytic Properties of MFI Zeolite

    Stud. Surf. Sci. Catal.   135   566 - 572  2001

  • Growth of Oriented Mordenite Membranes on Porous a-Al2O3 Support

    Stud. Surf. Sci. Catal.   135   3151 - 3159  2001

  • MFI Zeolite with Uniform Mesopores Created by Alkali Treatment

    Stud. Surf. Sci. Catal.   135   1820 - 1827  2001

  • Synthesis of Msoporous Materials Using Filtrate of Alkali Treatment of MFI Zeolite

    Stud. Surf. Sci. Catal.   135   1290 - 1297  2001

  • Membrane reactor application to hydrogen production

    E. Kikuchi

    Catalysis Today   56 ( 1-3 ) 97 - 101  2000.02

    　View Summary

    Selective removal of hydrogen in a membrane reactor enables the hydrogen production by steam reforming at lower reaction temperatures than conventional processes. We invented a composite membrane consisting of thin palladium layer deposited on the outer surface of porous ceramics by electroless-plating. The palladium layer could completely cover the surface, so that only hydrogen could permeate through the membrane with a 100% selectivity. By use of this kind of membrane, Tokyo Gas and Mitsubishi Heavy Industries have developed a membrane reformer applicable to the polymer electrolyte fuel cell system. Our current approach is the application of a CVD technique to deposit non-Pd metals, such as Pt, to overcome the limitations caused by Pd membranes, such as hydrogen embrittlement. The permeability and permeation selectivity of these metal-ceramic composite CVD membranes were investigated in a comparison with electroless-plating palladium membranes, as well as the performance in membrane reactors applied to steam reforming of methane. The permeation of hydrogen through the CVD membranes is not based on the solution-diffusion transport mechanism but on the surface diffusion mechanism. Although the CVD membranes gave higher conversion of methane than thermodynamic equilibrium, their performance became similar to electroless-plating membranes, only when the membranes showed high H2/N2 separation factors. © 2000 Elsevier Science B.V All rights reserved.

    DOI

  • Membrane reactor application to hydrogen production

    E Kikuchi

    CATALYSIS TODAY   56 ( 1-3 ) 97 - 101  2000.02

    　View Summary

    Selective removal of hydrogen in a membrane reactor enables the hydrogen production by steam reforming at lower reaction temperatures than conventional processes. We invented a composite membrane consisting of thin palladium layer deposited on the outer surface of porous ceramics by electroless-plating. The palladium layer could completely cover the surface, so that only hydrogen could permeate through the membrane with a 100% selectivity. By use of this kind of membrane, Tokyo Gas and Mitsubishi Heavy Industries have developed a membrane reformer applicable to the polymer electrolyte fuel cell system. Our current approach is the application of a CVD technique to deposit non-Pd metals, such as Pt, to overcome the limitations caused by Pd membranes, such as hydrogen embrittlement. The permeability and permeation selectivity of these metal-ceramic composite CVD membranes were investigated in a comparison with electroless-plating palladium membranes, as well as the performance in membrane reactors applied to steam reforming of methane. The permeation of hydrogen through the CVD membranes is not based on the solution-diffusion transport mechanism but on the surface diffusion mechanism. Although the CVD membranes gave higher conversion of methane than thermodynamic equilibrium, their performance became similar to electroless-plating membranes, only when the membranes showed high H-2/N-2 separation factors. (C) 2000 Elsevier Science B.V. All rights reserved.

    DOI

  • Remarkable Enhancement in Durability of Pd/H-ZSM-5 Zeolite Catalysts for CH4-SCR(共著)

    Appl. Catal.   B27/,L213  2000

    DOI

  • Rhodium-and Iridium-dispersed Porous Alumina Membranes and Their Hydrogen Permeation Properties(共著)

    KAJIWARA M, UEMIYA S, KOJIMA T, KIKUCHI E

    Catal. Today   56 ( 1/3 ) 83 - 87  2000

    DOI CiNii

  • Steam Reforming of Methane in Membrane Reactors : Comparison of Electroless-plating and CVD Membranes and Catalyst Packing Modes(共著)

    KIKUCHI E, NEMOTO Y, KAJIWARA M, UEMIYA S, KOJIMA T

    Catal. Today   56 ( 1/3 ) 75 - 81  2000

    DOI CiNii

  • Hydrogen Permeation Properties through Composite Membranes of Platinum Supported on Porous Alumina(共著)

    KAJIWARA M, UEMIYA S, KOJIMA T, KIKUCHI E

    Catal. Today   56 ( 1/3 ) 65 - 73  2000

    DOI CiNii

  • Palladium species in pd/h-zsm-5 zeolite catalysts for CH4-SCR

    E. Kikuchi, M. Ogura

    Research on Chemical Intermediates   26 ( 1 ) 55 - 60  2000

    　View Summary

    The active state of palladium for ṄO reduction with methane (CH4-SCR) was investigated by comparing the catalytic activity of Pd/H-ZSM-5 with that of PdO/SiO2. High catalytic activity for CH4-SCR was given by Pd/H-ZSM-5 in the temperature range of 300-500 °C. PdO/SiO2 catalyzed the reaction between NO2 and CH4 in the absence of oxygen, which retarded the reaction by consuming CH4 in combustion. CH4 combustion occurred on either zeolite-supported or silica-supported catalyst, while NO preferentially retarded the combustion on Pd/H-ZSM-5. NO was found to be chemisorbed on the palladium sites in zeolite, while it was hardly chemisorbed on PdO/SiO2. NaCI titration showed that the palladium species in zeolite are Pd2+ cations content, on which NO is strongly chemisorbed resulting in high selectivity for CH4-SCR. © VSP 2000.

    DOI CiNii

  • Preparation of Mordenite Membranes on-Alumina Tubular Supports for Pervaporation of Water-isopropyl alcohol Mixtures(共著)

    Chem. Comm.   2000/,957  2000

  • Formation of Uniform Mesopores in ZSM-5 Zeolite through Treatment in Alkaline Solution(共著)

    Chem. Lett.   2000/,882  2000

  • Catalytic Activity of Ir for NO-CO Reaction in the Presence of SO2 and Excess Oxygen

    Chem.Lett.   2000  2000

    DOI

  • Remarkable Enhancement in Durability of Pd/H-ZSM-5 Zeolite Catalysts for CH4-SCR(共著)

    Appl. Catal.   B27/,L213  2000

    DOI

  • Rhodium-and Iridium-dispersed Porous Alumina Membranes and Their Hydrogen Permeation Properties(共著)

    Catal. Today   56 ( 1/3 ) 83 - 87  2000

    DOI CiNii

  • Steam Reforming of Methane in Membrane Reactors : Comparison of Electroless-plating and CVD Membranes and Catalyst Packing Modes(共著)

    Catal. Today   56 ( 1/3 ) 75 - 81  2000

    DOI CiNii

  • Hydrogen Permeation Properties through Composite Membranes of Platinum Supported on Porous Alumina(共著)

    Catal. Today   56 ( 1/3 ) 65 - 73  2000

    DOI CiNii

  • Palladium Species in Pd/H-ZSM-5 Zeolite Catalysts for CH4-SCR(共著)

    Res. Chem. Intermed.   26 ( 1 ) 55 - 60  2000

    DOI CiNii

  • Preparation of Mordenite Membranes on-Alumina Tubular Supports for Pervaporation of Water-isopropyl alcohol Mixtures(共著)

    Chem. Comm.   2000/,957  2000

  • Formation of Uniform Mesopores in ZSM-5 Zeolite through Treatment in Alkaline Solution(共著)

    Chem. Lett.   2000/,882  2000

  • Catalytic Activity of Ir for NO-CO Reaction in the Presence of SO2 and Excess Oxygen

    Chem.Lett.   2000  2000

    DOI

  • Selective Reduction of NO by CH4 on Pd- and Co/Pd-HZSM-5 Catalysts

    The Fourth International Conference on Environmental Catalysis    1999

  • Determination of Active Palladium Species in ZSM-5 Zeolite for Selective Reduction of Nitric Oxide with Methane

    Appl.Catal.   B23  1999

    DOI

  • Catalytic Performances of Cobalt-based Ultrafine Particles Prepared by Chemical Reducation in Slurry-phase Fischer-Tropsch Synthesis

    KIKUCHI E, SORITA R, TAKAHASHI H, MATSUDA T

    Appl. Catal.   186 ( 1/2 ) 121 - 128  1999

    DOI CiNii

  • Conversion of Dry Gel to Microporous Crystals in Gas Phase

    Topics in Catal, 9, 77 (1999)   9  1999

  • Palladium Species in Co/Pd/H-ZSM-5 Catalysts for CH4-SCR of NOx

    Proceedings of the12th International Zeolite Conference     2833  1999

  • Synthesis of OU-1, a Large-pore, High Silica Zeolite by Dry Gel Conversion

    Proceedings of the12th International Zeolite Conference     2009  1999

  • Synthesis of Pure Silica BEA and Al-free Ti-BEA using TEAOH and Their Characterization

    Proc.of the 12th Intl.Zeolite Conf.     1515  1999

  • Conversion of Dry Gels to Zeolites(共著)

    Proc. Internal. Conf. On Solid-Solid Phase Transformation'99(JIMIC-3)   /,1421  1999

  • 窒素酸化物の炭化水素-SCR反応活性点と反応機構

    地球環境講演会    1999

  • Selective Reduction of NO by CH4 on Pd- and Co/Pd-HZSM-5 Catalysts

    The Fourth International Conference on Environmental Catalysis    1999

  • Determination of Active Palladium Species in ZSM-5 Zeolite for Selective Reduction of Nitric Oxide with Methane

    Appl.Catal.   B23  1999

    DOI

  • Catalytic Performances of Cobalt-based Ultrafine Particles Prepared by Chemical Reducation in Slurry-phase Fischer-Tropsch Synthesis

    Appl. Catal.   186 ( 1/2 ) 121 - 128  1999

    DOI CiNii

  • Conversion of Dry Gel to Microporous Crystals in Gas Phase

    Topics in Catal, 9, 77 (1999)   9  1999

  • Palladium Species in Co/Pd/H-ZSM-5 Catalysts for CH4-SCR of NOx

    Proceedings of the12th International Zeolite Conference     2833  1999

  • Synthesis of OU-1, a Large-pore, High Silica Zeolite by Dry Gel Conversion

    Proceedings of the12th International Zeolite Conference     2009  1999

  • Synthesis of Pure Silica BEA and Al-free Ti-BEA using TEAOH and Their Characterization

    Proc.of the 12th Intl.Zeolite Conf.     1515  1999

  • Conversion of Dry Gels to Zeolites(共著)

    Proc. Internal. Conf. On Solid-Solid Phase Transformation'99(JIMIC-3)   /,1421  1999

  • Active Sites of HC-SCR Catalysts based on Pd/ZSM-5

    17th International Conference on Catalysis - The Taniguchi Foundation-,    1998

  • Membrane Reactor Application to Hydrogen Production(Plenary)

    Third International Conference on Catalysis in Membrane Reactors(Copenhagen)    1998

  • Heterogeneous Catalysis in Membrane Reactors

    International Catalysis Symposium on “Frontier and Tasks of Catalysis towards Next Century”（文部省）    1998

  • Hydrogen Permeation through Composite CVD Membranes of Group VIII Metals and Porous Alumina

    Proceedings of the Fifth Intl. Conference on Inorganic Membranes   p.250  1998

  • Role of Zeolite Structure on Reduction of Nox with Methane over In-and Pd-based Catalysts

    Catalysis Today/ Elsevier   45;p.139  1998

    DOI

  • Intrapore Catalysis in Reduction of Nitric Oxide with Methane

    Catalysis Today/ Elsevier   42;p.159  1998

    DOI

  • The Effect of Zeolite Structures on the Creation of InO+ Active Sites for NOx

    OGURA M, OHSAKI T, KIKUCHI E

    Microporous and Mesoporous Materials/Elsevier   21 ( 4/6 ) 533 - 540  1998

    DOI CiNii

  • Phase Transformation of High Silica BEA to OU-1 and MTW

    Chem. Lett., 日本化学会   1998巻,311頁  1998

  • Phase Transformation of High Silica BEA to OU-1 and MTW

    Chemistry Letters、日本化学会   1998;p.311  1998

  • Syngas Formation by Partial Oxidation of Methane in Palladium Membrane Reactor

    Studies in Surface Science and Catalysis/ Elsevier   119;p.441  1998

  • 無機膜の進歩とメンブレンリアクターへの応用 - 水素製造反応を適用例として -（展望講演）

    化学工学会    1998

  • ゼオライトでNOxを還元する

    化学と教育/日本化学会   12;p.760  1998

  • Active Sites of HC-SCR Catalysts based on Pd/ZSM-5

    17th International Conference on Catalysis - The Taniguchi Foundation-,    1998

  • Membrane Reactor Application to Hydrogen Production(Plenary)

    Third International Conference on Catalysis in Membrane Reactors(Copenhagen)    1998

  • Heterogeneous Catalysis in Membrane Reactors

    International Catalysis Symposium on “Frontier and Tasks of Catalysis towards Next Century”（文部省）    1998

  • Hydrogen Permeation through Composite CVD Membranes of Group VIII Metals and Porous Alumina

    Proceedings of the Fifth Intl. Conference on Inorganic Membranes   p.250  1998

  • Role of Zeolite Structure on Reduction of Nox with Methane over In-and Pd-based Catalysts

    Catalysis Today/ Elsevier   45;p.139  1998

    DOI

  • Intrapore Catalysis in Reduction of Nitric Oxide with Methane

    Catalysis Today/ Elsevier   42;p.159  1998

    DOI

  • The Effect of Zeolite Structures on the Creation of InO+ Active Sites for NOx

    Microporous and Mesoporous Materials/Elsevier   21 ( 4/6 ) 533 - 540  1998

    DOI CiNii

  • Phase Transformation of High Silica BEA to OU-1 and MTW

    Chem. Lett., 日本化学会   1998巻,311頁  1998

  • Phase Transformation of High Silica BEA to OU-1 and MTW

    Chemistry Letters、日本化学会   1998;p.311  1998

  • Syngas Formation by Partial Oxidation of Methane in Palladium Membrane Reactor

    Studies in Surface Science and Catalysis/ Elsevier   119;p.441  1998

  • Catalytic Properties of Pd/Al2O3 calcined at high temperatures for methane combustion(San Francisco)

    ACS Symposium on Catalytic Combustion    1997

  • Hydrogen-Permselective Membrane Reactors

    CaTTech, Baltzer   第1巻, 67頁  1997

  • Zeolitic Membranes: Synthesis, Properties and Prospects

    Bull. Chem. Soc. Jpn.，日本化学会   第70巻,2341頁  1997

    DOI

  • Selective Reduction of Nitric Oxide with Methane on In/H-ZSM-5-based Catalysts

    Catal. Surveys from Jpn., Baltzer   第1巻,227頁  1997

  • Synthesis of a zeolitic thin layer by a vapor-phase transport method: appearance of a preferential orientation of MFI zeolite

    Microporous Materials, Elsevier   第11巻,107頁  1997

    DOI

  • Low-Temperature Syngas Formation by CO2 Reforming of Methane in a Hydrogen-Permselective Membrane Reactor.

    Stud. Surf. Sci. and Catal. Elsevier   第107巻, 547頁  1997

  • Low-Temperature Syngas Formation by CO2 Reforming of Methane in a Hydrogen-Permselective Membrane Reactor

    Stud. in Surface Science and Catalysis   107/,547  1997

  • Hydrogen-Permselective Membrane Reactors

    CaTTech.   1/,67  1997

  • 次世代リーンNOx触媒の開発

    NGCフォーラム'97    1997

  • メンブレンリアクター利用触媒反応プロセス

    触媒学会    1997

  • メタンによるNO選択還元反応における機能複合化効果

    文部省重点領域研究公開シンポ    1997

  • ゼオライトの細孔で起こる炭化水素-SCR反応

    触媒学会    1997

  • Catalytic Properties of Pd/Al2O3 calcined at high temperatures for methane combustion(San Francisco)

    ACS Symposium on Catalytic Combustion    1997

  • Hydrogen-Permselective Membrane Reactors

    CaTTech, Baltzer   第1巻, 67頁  1997

  • Zeolitic Membranes: Synthesis, Properties and Prospects

    Matsukata Masahiko, Kikuchi Eiichi

    Bull. Chem. Soc. Jpn.，日本化学会   第70巻,2341頁 ( 10 ) 2341 - 2356  1997

    　View Summary

    This article is intended to describe recent progress in the synthesis of zeolitic membranes and their permeation properties. While hydrothermal synthesis has been widely employed for zeolitic-membrane synthesis, the development of a new technique for zeolite synthesis, vapor-phase transport (VPT), has enabled us to prepare pinhole-free, zeolite-porous support composite membranes. This article consists of three sections that describe: a survey of the hydrothermal synthesis of zeolitic membranes, our synthesis results and the formation mechanism of zeolitic membranes by the VPT method as well as some permeation results to show the prospects of zeolitic membranes.

    DOI CiNii

  • Selective Reduction of Nitric Oxide with Methane on In/H-ZSM-5-based Catalysts

    Catal. Surveys from Jpn., Baltzer   第1巻,227頁  1997

  • Synthesis of a zeolitic thin layer by a vapor-phase transport method: appearance of a preferential orientation of MFI zeolite

    Microporous Materials, Elsevier   第11巻,107頁  1997

    DOI

  • Low-Temperature Syngas Formation by CO2 Reforming of Methane in a Hydrogen-Permselective Membrane Reactor.

    Stud. Surf. Sci. and Catal. Elsevier   第107巻, 547頁  1997

  • Low-Temperature Syngas Formation by CO2 Reforming of Methane in a Hydrogen-Permselective Membrane Reactor

    Stud. in Surface Science and Catalysis   107/,547  1997

  • Hydrogen-Permselective Membrane Reactors

    CaTTech.   1/,67  1997

  • YBa2Cu3Ox as an electroconductive catalyst for combustion of carbon monoxide

    E. Kikuchi, M. Hondo

    Catalysis Today   29 ( 1-4 ) 409 - 414  1996.05

    　View Summary

    YBa2Cu3Ox, known as a high-Tc superconductor, was used as an electroconductive catalyst and its characteristics in CO oxidation were investigated. Charging 3 V, direct current, heated YBa2Cu3Ox up to about 500°C, at which it could catalyze CO oxidation. Thus, this oxide has proper features required for electrically temperature-controlled combustion catalysts: one is self-heating property caused by electric current (Joule's heat) and the other is catalytic activity for combustion. The catalytic activity of YBa2Cu3Ox was greatly affected by the oxygen deficiency in the solid which was directly related to the partial pressure of oxygen in the reaction system.

    DOI

  • YBa2Cu3Ox as an electroconductive catalyst for combustion of carbon monoxide

    E. Kikuchi, M. Hondo

    Catalysis Today   29 ( 1-4 ) 409 - 414  1996.05

    　View Summary

    YBa2Cu3Ox, known as a high-Tc superconductor, was used as an electroconductive catalyst and its characteristics in CO oxidation were investigated. Charging 3 V, direct current, heated YBa2Cu3Ox up to about 500°C, at which it could catalyze CO oxidation. Thus, this oxide has proper features required for electrically temperature-controlled combustion catalysts: one is self-heating property caused by electric current (Joule's heat) and the other is catalytic activity for combustion. The catalytic activity of YBa2Cu3Ox was greatly affected by the oxygen deficiency in the solid which was directly related to the partial pressure of oxygen in the reaction system.

    DOI

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl.Catal.   A136/,19  1996

    DOI

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl.Catal.   A136  1996

    DOI

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl. Catal./Elsevier   A136  1996

    DOI

  • "Reduction of Nitric Oxide with Methane on Pd/Co/H-ZSM-5 Catalysts : Cooperative effects of Pd and Co"

    Catal. Lett.   42/,185  1996

  • Reduction of Nitric Oxide with Methane on Pd/Co/H-ZSM-5 Catalysts: Cooperative Effects of Pd and Co

    Catal. Lett.   42  1996

  • Steam Reforming and Related Reactions in Hydrogen-permselective Membrane Reactor

    Sekiyu Gakkaishi   39;5  1996

    DOI

  • YBa2Cu3Ox as an Electroconductive Catalyst for Combustion of Carbon Monoxide

    Catal Today   29/,409-14  1996

    DOI

  • YBa2Cu3Ox as an Electroconductive Catalyst for Combustion of Carbon Monoxide

    Catalysis Today/Elsevier   29  1996

    DOI

  • YBa2Cu3Ox as an Electroconductive Catalyst for Combustion of Carbon Monoxide

    Catal. Today   29  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst Selectibe Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Catalysis today   27/,35  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst for Selective Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Catalysis Today /Elsevier   27  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst for Selective Red

    Catalysis Today   27  1996

    DOI

  • Selective Reduction of Nitric Oxide with Methane on Gallium and Indium Containing H-ZSM-5 Catalysts : Formation of Active Sites by Solid State Ion Exchange

    J.Catal.   161/,465-470  1996

    DOI

  • Selective Reduction of Nitric Oxide with Methane on H-ZSM-5 Catalysts

    Containing Gallium or Indium: Formation of Active Sites by Solid State Ion Exchange,J. Catal.   161  1996

  • Precious Metal Loaded In/H-ZSM-5 for Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Stud.in Surface Sci.and Catal   110/,671  1996

  • Formation of Active Sites for Reduction of NO2 with Methane by Solid State Exchange of In2O3 into H-Zeolites"

    Stud. in Surface Science and Catalysis   105/,1593  1996

  • Formation of Active Sites for Reduction of NO2 with Methane by Solid State Exchange of In2O3 into H-Zeolites

    Stud. in Surface Science and Catalysi   105  1996

  • Precious Metal Loaded In/H-ZSM-5 for Reduction of Nitric Oxide with Me thane in the Presence of Water Vapor

    Stud. in Surface Science and Catalysis   101  1996

  • Ir/In/H-ZSM-5触媒上でのメタンによるNO選択還元反応

    触媒   *38;6  1996

  • 壮年期の学会への期待

    ペトロテック   19;5  1996

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl.Catal.   A136/,19  1996

    DOI

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl.Catal.   A136  1996

    DOI

  • Shape Selective Alkylation of Biphenyl with Propene on SAPO-11 Catalysts

    Appl. Catal./Elsevier   A136  1996

    DOI

  • "Reduction of Nitric Oxide with Methane on Pd/Co/H-ZSM-5 Catalysts : Cooperative effects of Pd and Co"

    Catal. Lett.   42/,185  1996

  • Reduction of Nitric Oxide with Methane on Pd/Co/H-ZSM-5 Catalysts: Cooperative Effects of Pd and Co

    Catal. Lett.   42  1996

  • Steam reforming and related reactions in hydrogen-permselective membrane reactor

    Eiichi Kikuchi

    Sekiyu Gakkaishi (Journal of the Japan Petroleum Institute)   39 ( 5 ) 301 - 313  1996

    　View Summary

    Selective and efficient permeation of H2 was accomplished by a thin Pd or Pd-Ag alloy membrane supported on porous alumina ceramics. Such membranes were prepared by deposition of Pd or Pd and Ag on the outer surface of the support cylinder by an electroless plating technique. It was found that either steam or CO2 reforming of CH4 was promoted beyond equilibrium by use of a membrane reactor with the Pd/ceramic composite membrane at temperatures as low as 773 K. In spite of a similar type of reforming, a quite different pattern of reaction products was obtained in the membrane reactor: H2 and CO2 from steam reforming, and H2 and CO (syngas) from CO2 reforming. Nickel catalyzed carbon-free steam reforming, and the level of CH4 conversion depended on the efficiency of the membrane for H2 permeation since the rate of H2 production was sufficiently higher than that of H2 permeation. On the contrary, carbon deposition extensively took place in CO2 reforming on Ni catalyst, while alumina-supported noble metals showed far less selectivities for carbon deposition than did Ni even in the membrane reactor. Differing from the activity sequence observed in the conventional reaction system, it was found in membrane reactor that it decreased in the order: Rh∼Pt&gt
    Pd&gt
    Ru&gt
    Ir, due to contamination of the active surface. Among the noble metal catalysts tested, Pt supported on Al2O3-La2O3 and Al2O3-CeO2 was effective without significant carbon deposition to enable prolonged activity. The membrane reactor can provide a partial oxidation process with utilization of air instead of pure O2 to produce H2 or syngas.

    DOI

  • YBa2Cu3Ox as an Electroconductive Catalyst for Combustion of Carbon Monoxide

    Catal Today   29/,409-14  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst Selectibe Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Catalysis today   27/,35  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst for Selective Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Catalysis Today /Elsevier   27  1996

    DOI

  • Promotive Effect of Additives to In/H-ZSM-5 Catalyst for Selective Red

    Catalysis Today   27  1996

    DOI

  • Selective Reduction of Nitric Oxide with Methane on Gallium and Indium Containing H-ZSM-5 Catalysts : Formation of Active Sites by Solid State Ion Exchange

    J.Catal.   161/,465-470  1996

    DOI

  • Selective Reduction of Nitric Oxide with Methane on H-ZSM-5 Catalysts

    Containing Gallium or Indium: Formation of Active Sites by Solid State Ion Exchange,J. Catal.   161  1996

  • Precious Metal Loaded In/H-ZSM-5 for Reduction of Nitric Oxide with Methane in the Presence of Water Vapor

    Stud.in Surface Sci.and Catal   110/,671  1996

  • Formation of Active Sites for Reduction of NO2 with Methane by Solid State Exchange of In2O3 into H-Zeolites"

    Stud. in Surface Science and Catalysis   105/,1593  1996

  • Formation of Active Sites for Reduction of NO2 with Methane by Solid State Exchange of In2O3 into H-Zeolites

    Stud. in Surface Science and Catalysi   105  1996

  • Precious Metal Loaded In/H-ZSM-5 for Reduction of Nitric Oxide with Me thane in the Presence of Water Vapor

    Stud. in Surface Science and Catalysis   101  1996

  • Palladium/ceramic membranes for selective hydrogen permeation and their application to membrane reactor

    Eiichi Kikuchi

    Catalysis Today   25 ( 3-4 ) 333 - 337  1995.08

    　View Summary

    Plating thin Pd or Pd-Ag alloy film on the outer surface of a porous alumina ceramic tube enables very rapid hydrogen permeation with an absolute selectivity based on the solution-diffusion transport mechanism. Effectiveness, such as displacement of thermodynamic equilibrium, selectivity enhancement, is brought forth by incorporating the metal/ceramic composite membrane in the catalytic reactor, as demonstrated in concrete examples of steam and CO2 reforming of methane and dehydrogenation of isobutane. It is also shown that the membrane reactor occasionally requires its own catalyst which is different from conventional ones. © 1995.

    DOI

  • Liquid-phase methanol synthesis on Cu-based ultrafine particles prepared by chemical deposition in liquid phase

    T. Matsuda, M. Shizuta, J. Yoshizawa, E. Kikuchi

    Applied Catalysis A, General   125 ( 2 ) 293 - 302  1995.05

    　View Summary

    Liquid-phase methanol synthesis was investigated using copper-based ultrafine particle (UFP) catalysts. Cu{single bond}Zn UFP catalyst was active for methanol synthesis, although the activity decreased with time-on-stream. Cu{single bond}V UFP catalyst was stable against deactivation and showed the highest methanol productivity of the catalysts tested. The space time yield of methanol on this catalyst was about 3.5 times as large as that of a co-precipitated Cu{single bond}Zn catalyst. The selectivity of the Cu{single bond}V UFP catalyst for methanol was low, as compared to that of the co-precipitated Cu{single bond}Zn catalyst, due to the formation of methane. The addition of carbon dioxide in the feed gas was effective in suppressing the formation of methane. © 1995 Elsevier Science B.V. All rights reserved.

    DOI

  • Liquid-phase methanol synthesis on Cu-based ultrafine particles prepared by chemical deposition in liquid phase

    T. Matsuda, M. Shizuta, J. Yoshizawa, E. Kikuchi

    Applied Catalysis A, General   125 ( 2 ) 293 - 302  1995.05

    　View Summary

    Liquid-phase methanol synthesis was investigated using copper-based ultrafine particle (UFP) catalysts. Cu{single bond}Zn UFP catalyst was active for methanol synthesis, although the activity decreased with time-on-stream. Cu{single bond}V UFP catalyst was stable against deactivation and showed the highest methanol productivity of the catalysts tested. The space time yield of methanol on this catalyst was about 3.5 times as large as that of a co-precipitated Cu{single bond}Zn catalyst. The selectivity of the Cu{single bond}V UFP catalyst for methanol was low, as compared to that of the co-precipitated Cu{single bond}Zn catalyst, due to the formation of methane. The addition of carbon dioxide in the feed gas was effective in suppressing the formation of methane. © 1995 Elsevier Science B.V. All rights reserved.

    DOI

  • Effect of SiO2/Al2O3 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenyl with Propene

    Appl.Catal.   A131/,293  1995

    DOI

  • Effect of SiO2/Al2O3 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenil with Propene

    Appl. Catal. /Elsevier   A131  1995

    DOI

  • Effect of SiO2/Al203 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenil with Propene

    Appl. Catal.   A127/,293  1995

  • Catalytic Properties of Copper-exchanged Clays for the Dehydrogenation of Methanol to Nethyl Formate

    Appl.Catal.   A126/,177  1995

    DOI

  • Catalytic Properties of Copper-exchanged Clays for the Dehydrogenation of Methanol to Methyl Formate

    Appl. Catal. /Elsevier   A126  1995

    DOI

  • Liquid-phase Methanol Synthesis on Cu-based Ultrafine Particles Prepared by Chemical Deposition in the Liquid Phase

    Appl. Catal./Elsevier   A125;2  1995

  • Liquid-phase Methanol Synthesis on Cu-based Ultrafine Particles Prepared by Chemical Deposition in the Liquid Phase

    Appl. Catal.   A125/,293  1995

    DOI

  • Liquid-phase Methanol Synthesis on Cu-based Ultrafine Particles Perpared by Chemical Deposition in the Liquid Phase

    Appl.Catal.   A125/,293  1995

    DOI

  • Mechanism of Selective Catalytic Reduction of NO by Propene on Fe Silicate in Oxygen-rich atmosphere A Transient Response Study

    ACS Symposium Series   587/,123  1995

  • Mechanism of Selective Catalytic Reduction of NO by Propene on Fe Silicate in Oxygen-rich Atmosphere: A Transient Response Study

    ACS Symposium Series/アメリカ化学会   587  1995

  • Effects of Cr Addition on the Catalytic Properties of Ultrafine Particles of Co for Liquid Phase Fischer-Tropsch Synthesis

    Sekiyu Gakkaishi /石油学会   38;5  1995

  • Palladium/Ceramic Membranes for Selective Hydrogen Permeationand their Application to Membrane Reactor

    Catalysis Today/Elsevier   25;3,4  1995

    DOI

  • palladium/Ceramic Membranes for Selectibe Hydrogen Permeation and their Application to Membrane Reactor

    Catalysis Today   25/,333  1995

    DOI

  • Precious Metal Load In/H-ZSM-5 for Low Concentration No Reduction with Methane in the Presence of Water Vapor

    Cem.Lett.   1995/,1135  1995

  • Precious Metal Loaded In/H-ZSM-5 for Low Concentration NO Reduction with Methane in the Presence of Water Vapor

    Chem. Lett./日本化学会   1995  1995

    DOI

  • Effect of Spiltover Hydrogen on Stabilization of Catalytic Activities of Y-type zeolite and Pillared Montmorillonite for Disproportionation of 1,2,4-Trimethylbenzene

    J. Catal.   154/,41  1995

    DOI

  • Effect of Spiltover Hydrogen on Stabilization of Catalytic Activities of Y-type zeolite and Pillared Montmorillonite for Disproportionation of 1,2,4-Trimethylbenzene

    J. Catal. /Academic Press   154  1995

    DOI

  • Alkylation of Biphenyl with Propene on HNa Mordenite

    Appl. Catal.   123/,205  1995

    DOI

  • 窒素酸化物除去触媒

    化学工業/化学工業社   46;12  1995

  • 液相FT合成用コバルト超微粒子触媒に対するクロムの添加効果

    石油学会誌   38/,  1995

  • 水素透過膜を用いた触媒反応

    触媒/触媒学会   37;5  1995

  • ゼオライトを用いたNOx選択還元反応

    ゼオライト/ゼオライト研究会   12;4  1995

    DOI

  • Effect of SiO2/Al2O3 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenyl with Propene

    Appl.Catal.   A131/,293  1995

    DOI

  • Effect of SiO2/Al2O3 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenil with Propene

    Appl. Catal. /Elsevier   A131  1995

    DOI

  • Effect of SiO2/Al203 Ratio on the Catalytic Properties of Mordenite for Alkylation of Biphenil with Propene

    Appl. Catal.   A127/,293  1995

  • Catalytic Properties of Copper-exchanged Clays for the Dehydrogenation of Methanol to Nethyl Formate

    Appl.Catal.   A126/,177  1995

    DOI

  • Catalytic Properties of Copper-exchanged Clays for the Dehydrogenation of Methanol to Methyl Formate

    Appl. Catal. /Elsevier   A126  1995

    DOI

  • Liquid-phase Methanol Synthesis on Cu-based Ultrafine Particles Prepared by Chemical Deposition in the Liquid Phase

    Appl. Catal./Elsevier   A125;2  1995

  • Mechanism of Selective Catalytic Reduction of NO by Propene on Fe Silicate in Oxygen-rich atmosphere A Transient Response Study

    ACS Symposium Series   587/,123  1995

  • Mechanism of Selective Catalytic Reduction of NO by Propene on Fe Silicate in Oxygen-rich Atmosphere: A Transient Response Study

    ACS Symposium Series/アメリカ化学会   587  1995

  • Effects of Cr Addition on the Catalytic Properties of Ultrafine Particles of Co for Liquid Phase Fischer-Tropsch Synthesis

    Sekiyu Gakkaishi /石油学会   38;5  1995

  • Palladium/Ceramic Membranes for Selective Hydrogen Permeationand their Application to Membrane Reactor

    Catalysis Today/Elsevier   25;3,4  1995

    DOI

  • Precious Metal Load In/H-ZSM-5 for Low Concentration No Reduction with Methane in the Presence of Water Vapor

    Cem.Lett.   1995/,1135  1995

  • Precious Metal Loaded In/H-ZSM-5 for Low Concentration NO Reduction with Methane in the Presence of Water Vapor

    Chem. Lett./日本化学会   1995  1995

    DOI

  • Effect of Spiltover Hydrogen on Stabilization of Catalytic Activities of Y-type zeolite and Pillared Montmorillonite for Disproportionation of 1,2,4-Trimethylbenzene

    J. Catal.   154/,41  1995

    DOI

  • Effect of Spiltover Hydrogen on Stabilization of Catalytic Activities of Y-type zeolite and Pillared Montmorillonite for Disproportionation of 1,2,4-Trimethylbenzene

    J. Catal. /Academic Press   154  1995

    DOI

  • Alkylation of Biphenyl with Propene on HNa Mordenite

    Appl. Catal.   123/,205  1995

    DOI

  • Selective catalytic reduction of nitrogen monoxide by methane on zeolite catalysts in an oxygen-rich atmosphere

    Eiichi Kikuchi, Katsunori Yogo

    Catalysis Today   22 ( 1 ) 73 - 86  1994.12

    　View Summary

    Selective reduction of NO by CH4 on zeolite catalysts has been studied. After an investigation of the catalytic features of various cation-exchanged zeolites, we found that Ga-ZSM-5 and In-ZSM-5 were highly active and selective for NO reduction by CH4. We also showed that this reaction was moderately promoted even by H-form ZSM-5, mordenite, and ferrierite. From the catalytic performance of Ga-and In-ZSM-5 in NO-CH4-O2, NO2-CH4-O2, and NO-O2 reactions, it is concluded that the selective reduction of NO on these catalysts proceeds in two stages: (1) NO is oxidized to NO2 on zeolite acid sites, (2) NO2 and CH4 react on gallium or indium sites. The highly selective features of Ga and In in the zeolite for the NO2-CH4 reaction seem to be attributed to the coordinatively unsaturated nature of these sites which adsorb both of these reactants on the same site. Effect of water vapor on NO conversion was also investigated. It was found that Ga-ZSM-5 was strongly inhibited by steam, while In-ZSM-5 was fairly active even in the presence of 10% steam. © 1994.

    DOI

  • Reaction Mechanism of Selective Reduction of Nitric Oxide by Methane on Ga-and In-ZSM-5 Catalysts

    Studies. in Surface Science and Catalysis   84/,1547  1994

  • Selective Synthesis of 4,4'-Diisopropylbiphenyl Using Mordenite Catalysts

    Stub. in Surface Science and Catalysis   83/,295  1994

  • Characterization of Fe-silicates and their Catalytic Properties for the Selective Reduction of Nitric Oxide by Hydrocarbons

    Microporous Materials   3/,39  1994

    DOI

  • Selective Catalytic Reduction of Nitrogen Monoxide by Methane on Zeolite Catalysts in Oxygen-rich Atmosphere

    Catalysis Today   22/,73  1994

    DOI

  • Catalytic Combustion of Carbon Monoxide over YBa2Cu3Ox Electroconductive Catalyst

    Chem. Lett.   /,2207  1994

    DOI

  • GaおよびInイオン交換ゼオライト上でのメタンによるNOの選択還元反応機構

    触媒   36  1994

  • Reaction Mechanism of Selective Reduction of Nitric Oxide by Methane on Ga-and In-ZSM-5 Catalysts

    Studies. in Surface Science and Catalysis   84/,1547  1994

  • Selective Synthesis of 4,4'-Diisopropylbiphenyl Using Mordenite Catalysts

    Stub. in Surface Science and Catalysis   83/,295  1994

  • Characterization of Fe-silicates and their Catalytic Properties for the Selective Reduction of Nitric Oxide by Hydrocarbons

    Microporous Materials   3/,39  1994

    DOI

  • Catalytic Combustion of Carbon Monoxide over YBa2Cu3Ox Electroconductive Catalyst

    Chem. Lett.   /,2207  1994

    DOI

  • Synthesis of symmetrical alkyl-aromatics by use of shape selective catalysts

    T. Matsuda, E. Kikuchi

    Research on Chemical Intermediates   19 ( 4 ) 319 - 332  1993.12

    　View Summary

    The concept of shape selectivity is available to produce symmetrical dinuclear aromatic hydrocarbons such as 2,6-dialkylnaphthalene and 4,4′-dialkylbiphenyl, which are the raw materials for liquid crystals and polyester with superior properties, respectively. The ZSM-5 catalyst exhibits high activity and selectivity for the formation of p-xylene in the disproportionation and alkylation of toluene. The catalytic activity of ZSM-5 for the conversion of naphthalene derivatives is markedly low due to its small pore size, although symmetrical dinuclear aromatic hydrocarbons are selectively formed. The high catalytic activity is obtained with twelve-membered ring zeolites. Among these zeolites, mordenite is the most selective catalyst to produce symmetrical dinuclear aromatic hydrocarbons. The precise controls of the size of pore opening and the acidic property are required to enhance the selectivity for symmetrical dinuclear aromatic hydrocarbons. The non-zeolitic molecular sieves also present a great opportunity in high selective synthesis of these compounds. © 1993 VSP.

    DOI

  • Synthesis of symmetrical alkyl-aromatics by use of shape selective catalysts

    T. Matsuda, E. Kikuchi

    Research on Chemical Intermediates   19 ( 4 ) 319 - 332  1993.12

    　View Summary

    The concept of shape selectivity is available to produce symmetrical dinuclear aromatic hydrocarbons such as 2,6-dialkylnaphthalene and 4,4′-dialkylbiphenyl, which are the raw materials for liquid crystals and polyester with superior properties, respectively. The ZSM-5 catalyst exhibits high activity and selectivity for the formation of p-xylene in the disproportionation and alkylation of toluene. The catalytic activity of ZSM-5 for the conversion of naphthalene derivatives is markedly low due to its small pore size, although symmetrical dinuclear aromatic hydrocarbons are selectively formed. The high catalytic activity is obtained with twelve-membered ring zeolites. Among these zeolites, mordenite is the most selective catalyst to produce symmetrical dinuclear aromatic hydrocarbons. The precise controls of the size of pore opening and the acidic property are required to enhance the selectivity for symmetrical dinuclear aromatic hydrocarbons. The non-zeolitic molecular sieves also present a great opportunity in high selective synthesis of these compounds. © 1993 VSP.

    DOI

  • Selective Catalytic Reduction of Nitric Oxide with Ethene on Gallium Ion Exchanged ZSM-5 under Oxygen Rich

    Appl. Catal. Elsevier   B2  1993

    DOI

  • Catalytic Properties and Crystalline Structures of Manganese Promoted Iron Ultrafine Particles for Liquid Phase Hydrogenation of Carbon Monoxide

    Appl. Catal. Elsevier   A96  1993

    DOI

  • The Effect of Spillover Hydrogen on Coke Formation Catalyzed by HY Zeolite and Pillared Montmorillonite

    Stud. in Surf Sci. and Catal. Elsevier   77  1993

  • Liquid Phase Hydrogenation of Carbon Monoxide Using Ultrafine Particles of Cobalt as Catalyst

    Sekiyu Gakkaishi   36-5  1993

  • Selective Reduction of Nitric Oxide by Methane on H-form Zeolite Catalysts in Oxygen-rich Atmosphere

    Catal. Lett.   19  1993

    DOI

  • ゼオライト触媒上でのメタンによるNO選択還元

    触媒   35  1993

  • Selective Catalytic Reduction of Nitric Oxide with Ethene on Gallium Ion Exchanged ZSM-5 under Oxygen Rich

    Appl. Catal. Elsevier   B2  1993

    DOI

  • Catalytic Properties and Crystalline Structures of Manganese Promoted Iron Ultrafine Particles for Liquid Phase Hydrogenation of Carbon Monoxide

    Appl. Catal. Elsevier   A96  1993

    DOI

  • The Effect of Spillover Hydrogen on Coke Formation Catalyzed by HY Zeolite and Pillared Montmorillonite

    Stud. in Surf Sci. and Catal. Elsevier   77  1993

  • Liquid Phase Hydrogenation of Carbon Monoxide Using Ultrafine Particles of Cobalt as Catalyst

    Sekiyu Gakkaishi   36-5  1993

  • Selective Reduction of Nitric Oxide by Methane on H-form Zeolite Catalysts in Oxygen-rich Atmosphere

    Catal. Lett.   19  1993

    DOI

  • Migration of Alkali and Alkaline Earth Elements into Carbon Black

    Fuel   71  1992

    DOI

  • A New Classification of Alkali and Alkaline Earth Catalysts for Gasification of Carbon

    Fuel    1992

    DOI

  • Migration of Alkali and Alkaline Earth Elements into Carbon Black

    Fuel   71  1992

    DOI

  • A New Classification of Alkali and Alkaline Earth Catalysts for Gasification of Carbon

    Fuel    1992

    DOI

  • Liquid Phase Fischer-Tropsch Synthesis on Ultrafine Particles of Iron : Effect of Preoxidation Treatment

    Ａｐｐｌ．Ｃａｔａl．   77  1991

    DOI

  • Liquid Phase Fischer-Tropsch Synthesis on Manganese-Promoted Ultrafine Particles of Iron as a Catalyst

    Applied Catalysis   77  1991

  • Promotion of the Conversion of Propane to Aromatics by Use of Palladium Membrane Reactor

    Applied Catalysis   76  1991

    DOI

  • Steam Reforming of Methane in a Hydrogen-permeating Membrane Reactor

    Applied Catalysis   67  1991

    DOI

  • Separation of Hydrogen through Palladium Thin Film Supported on a Porous Glass Tube

    J. Membrane Science   56  1991

    DOI

  • Hydrogen Permeable Palladium-Silver Alloy Membrane Supported on Porous Ceramics

    J. Membrane Science   56  1991

    DOI

  • The Water Gas Shift Reaction Assisted by Palladium Membrane Reactor

    Ind. Eng. Chem. Res   30  1991

    DOI

  • Selective Reduction of NO with Propene on Fe-silicate Catalysts

    Chemistry Letters   1991  1991

    DOI

  • Liquid Phase Fischer-Tropsch Synthesis on Ultrafine Particles of Iron : Effect of Preoxidation Treatment

    Ａｐｐｌ．Ｃａｔａl．   77  1991

    DOI

  • Liquid Phase Fischer-Tropsch Synthesis on Manganese-Promoted Ultrafine Particles of Iron as a Catalyst

    Applied Catalysis   77  1991

  • Promotion of the Conversion of Propane to Aromatics by Use of Palladium Membrane Reactor

    Applied Catalysis   76  1991

    DOI

  • Steam Reforming of Methane in a Hydrogen-permeating Membrane Reactor

    Applied Catalysis   67  1991

    DOI

  • Separation of Hydrogen through Palladium Thin Film Supported on a Porous Glass Tube

    J. Membrane Science   56  1991

    DOI

  • Hydrogen Permeable Palladium-Silver Alloy Membrane Supported on Porous Ceramics

    J. Membrane Science   56  1991

    DOI

  • The Water Gas Shift Reaction Assisted by Palladium Membrane Reactor

    Ind. Eng. Chem. Res   30  1991

    DOI

  • Selective Reduction of NO with Propene on Fe-silicate Catalysts

    Chemistry Letters   1991  1991

    DOI

  • Liquid Phase Hydrogenatun of Carbon Monoxide over Potassium-promoted Ultrafine Particles of Iron and Copper

    Applied Catalysis   67  1990

    DOI

  • Auger Electron Spectroscopy and Electron Probe Microanalysis Observations of Barium and Calcium Located on Amorphous Carbon under Gasification Conditions

    Energy and Fuels   1990  1990

    DOI

  • Liquid Phase Hydrogenatun of Carbon Monoxide over Potassium-promoted Ultrafine Particles of Iron and Copper

    Applied Catalysis   67  1990

    DOI

  • Auger Electron Spectroscopy and Electron Probe Microanalysis Observations of Barium and Calcium Located on Amorphous Carbon under Gasification Conditions

    Energy and Fuels   1990  1990

    DOI

  • Novel Catalyst for Liquid-Phase Fischer-Tropsch Synthesis : Potassium-promoted Copper-Iron Ultrafine Particles Prepared by Liquid-phase Chemical Deposition

    Applied Catalysis   47  1989

    DOI

  • Quantitative Behavior of Potassium Species on an Amorphous Carbon under Steam Gasification Conditions

    Energy and Fuels   1989  1989

    DOI

  • Novel Catalyst for Liquid-Phase Fischer-Tropsch Synthesis : Potassium-promoted Copper-Iron Ultrafine Particles Prepared by Liquid-phase Chemical Deposition

    Applied Catalysis   47  1989

    DOI

  • Quantitative Behavior of Potassium Species on an Amorphous Carbon under Steam Gasification Conditions

    Energy and Fuels   1989  1989

    DOI

  • Physical and Catalytic Properties of Smectite Clays Pillared by Alumina in Disproportionation of 1,2,4-Trimethylbenzene

    Applied Catalysis   45  1988

    DOI

  • Hexane-Carbon Dioxide Reaction Catalyzed by Alkaline Earth Metal Oxides II Reaction Network

    Ａｐｐｌ. Catal.   41  1988

    DOI

  • Properties and Product Selectivities of Iron Ultrafine Particles as a Catalyst for Liquid Phase Hydrogenation of Carbon Monoxide

    Applied Catalysis   40  1988

    DOI

  • Effect of High-Temperature Treatment on the Activity of Montmorillonite Pillared by Alumina in the Conversion of 1,2,4-Trimethylbenzene

    Applied Catalysis   38  1988

    DOI

  • Hexane-Carbon Dioxide Reaction Catalyzed by Alkaline Earth Oxides I. Catalytic Behavior and Intermediate

    Applied Catalysis   37  1988

    DOI

  • Shape selective acid catalysis by pillared clays

    E. Kikuchi, T. Matsuda

    Catalysis Today   2 ( 2-3 ) 297 - 307  1988

    DOI

  • Interaction between Potassium Carbonate and Carbon Substrate at Sub-gasification Temperatures

    Energy and Fuels   1988  1988

  • Physical and Catalytic Properties of Smectite Clays Pillared by Alumina in Disproportionation of 1,2,4-Trimethylbenzene

    Applied Catalysis   45  1988

    DOI

  • Hexane-Carbon Dioxide Reaction Catalyzed by Alkaline Earth Metal Oxides II Reaction Network

    Ａｐｐｌ. Catal.   41  1988

    DOI

  • Properties and Product Selectivities of Iron Ultrafine Particles as a Catalyst for Liquid Phase Hydrogenation of Carbon Monoxide

    Applied Catalysis   40  1988

    DOI

  • Effect of High-Temperature Treatment on the Activity of Montmorillonite Pillared by Alumina in the Conversion of 1,2,4-Trimethylbenzene

    Applied Catalysis   38  1988

    DOI

  • Hexane-Carbon Dioxide Reaction Catalyzed by Alkaline Earth Oxides I. Catalytic Behavior and Intermediate

    Applied Catalysis   37  1988

    DOI

  • Shape selective acid catalysis by pillared clays

    E. Kikuchi, T. Matsuda

    Catalysis Today   2 ( 2-3 ) 297 - 307  1988

    DOI

  • Interaction between Potassium Carbonate and Carbon Substrate at Sub-gasification Temperatures

    Energy and Fuels   1988  1988

  • The Effect of Spilled-over Hydrogen on the Activity of Montmorillonite Pillared by Aluminum Oxide for Conversion of Trimethylbenzenes

    J. Catalysis   106  1987

    DOI

  • The Effect of Spilled-over Hydrogen on the Activity of Montmorillonite Pillared by Aluminum Oxide for Conversion of Trimethylbenzenes

    J. Catalysis   106  1987

    DOI

  • Reaction of 1,2,4-Trimethylbenzene and Methanol on Montmorillonite Catalysts Pillared by Aluminium Hydroxyl Complexes

    Applied Catalysis   21  1986

    DOI

  • Reaction of 1,2,4-Trimethylbenzene and Methanol on Montmorillonite Catalysts Pillared by Aluminium Hydroxyl Complexes

    Applied Catalysis   21  1986

    DOI

  • Conversion of Trimethylbenzenes over Montmorillonites Pillared by Aluminium and Zirconium Oxides

    Applied Catalysis   16  1985

    DOI

  • Conversion of Trimethylbenzenes over Montmorillonites Pillared by Aluminium and Zirconium Oxides

    Applied Catalysis   16  1985

    DOI

  • Fischer-Tropsch Synthesis over Titania-supported Ruthenium Catalysts

    Applied Catalysis   10  1984

    DOI

  • Fischer-Tropsch Synthesis over Titania-supported Ruthenium Catalysts

    Applied Catalysis   10  1984

    DOI

  • Fischer-Tropsch Synthesis of Hydrocarbons on V2O3-supported Ruthenium Catalysts

    Applied Catalysis   7  1983

    DOI

  • Supported Alkali Catalysts for Steam Gasification of Carbonaceous Residues from Petroleum

    Fuel   62  1983

    DOI

  • Fischer-Tropsch Synthesis of Hydrocarbons on V2O3-supported Ruthenium Catalysts

    Applied Catalysis   7  1983

    DOI

  • Supported Alkali Catalysts for Steam Gasification of Carbonaceous Residues from Petroleum

    Fuel   62  1983

    DOI

  • The Location of Catalytic Iron in Reduced Graphite Ferric Chloride

    J. Catalysis   62  1980

    DOI

  • The Location of Catalytic Iron in Reduced Graphite Ferric Chloride

    J. Catalysis   62  1980

    DOI

  • Catalytic Synthesis of Hydrocarbons from Carbon Monoxide and Hydrogen on Lamellar Compound of Graphite Interealated by Ferric Chloride

    J. Catalysis   57  1979

    DOI

  • Catalytic Synthesis of Hydrocarbons from Carbon Monoxide and Hydrogen on Lamellar Compound of Graphite Interealated by Ferric Chloride

    J. Catalysis   57  1979

    DOI

  • The Reaction of n-Heptane on Rhodium Catalysts in the Presence of Steam

    J. Catalysis   46  1977

    DOI

  • The Reaction of n-Heptane on Rhodium Catalysts in the Presence of Steam

    J. Catalysis   46  1977

    DOI

  • Studies of the Enhancement of Hydrogen Adsorption during H2-O2 Titration on Supported Pt Catalysts

    J. Catalysis   34  1974

    DOI

  • Studies of the Enhancement of Hydrogen Adsorption during H2-O2 Titration on Supported Pt Catalysts

    J. Catalysis   34  1974

    DOI

  • Hydrogenolysis and Isomerization of n-Pentane on Group VIII Transition Metals

    J. Catalysis   22  1971

  • Hydrogenolysis and Isomerization of n-Pentane on Group VIII Transition Metals

    J. Catalysis   22  1971

  • Hydrogenolysis of n-Pentane on Nickel Catalyst

    J. Catalysis   15  1969

  • Hydrogenolysis of n-Pentane on Nickel Catalyst

    J. Catalysis   15  1969

▼display all

 

Internal Special Research Projects

  • ＣＯ変成用新規ペロブスカイト型酸化物触媒の開発

    2006  

    　View Summary

    燃料電池用の水素製造においては、改質ガス中のCO除去プロセス（COシフト反応→CO選択酸化）が必要不可欠となっており，現在のPt電極性能では10 ppm以下へのCO濃度低減が要求される．COシフト反応には工業的にCu-Zn系酸化物触媒が用いられているが，PEFC特有のDSS（デイリースタートアップ＆シャットダウン）運転では，酸化雰囲気に弱い従来のCu-Zn系酸化物触媒の使用は困難とされており，酸化雰囲気に強く，低温，高空間速度で高活性な新規触媒の開発が求められている．本研究では高い酸素イオン伝導性を有するペロブスカイト型酸化物に注目し，これを触媒担体として用いて，低温での水性ガスシフト反応を検討した．触媒の格子酸素が反応に寄与するRedox機構で進行させることができるのなら，DSSでの酸化に強い触媒系となることが期待される．さらにPt, Pdなどの活性金属を担持することで格子酸素の再生・放出を促進し，Redox領域の低温化を図り，検討を行った．その結果、Pt, PdとLaCoO3を組み合わせた触媒を用いた場合、Pt/LaCoO3とPd/LaCoO3は高いシフト活性を示した．活性が低い触媒の反応前後の結晶構造はほとんど変化していないのに対し，高活性を示したPt/LaCoO3, Pd/LaCoO3についてはLaCoO3に起因するピークが低角度側にシフトし，ブロードとなる変化がみられた．これは反応中に格子酸素が放出され，ペロブスカイト型構造が歪んでしまったためと考えられる．また，Air処理による検討から，活性低下の原因と反応中での結晶構造の変化には相関がないと考えられる．XPS測定により，Pt, Pdの電子状態を解析した．その結果，Pt/LaCoO3ではPt2+-2がシフト反応に大きく寄与していることがわかり，活性低下の原因はPt2+-2が反応中に還元されるためと考えられた．また，Pd/LaCoO3ではPd種がRedoxしており，安定した活性種となっていることが示唆された．これを受けて，安定なRedoxサイクルを進行するPd種がPt種の還元を抑制するようなシナジー効果を期待し，Pt-Pd/LaCoO3触媒を検討したところ，1 wt%Pt-0.5 wt%Pd/LaCoO3は商用触媒の活性を上回る高活性触媒となった．

  • 非Ｌａｎｇｕｍｕｉｒ－Ｈｉｎｓｈｅｌｗｏｏｄ機構により進行する新規水素製造用触媒

    2006  

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    メタン水蒸気改質反応用Ni触媒としてペロブスカイト型酸化物を適用することで、工業的に用いられるアルミナなどの担体とした場合と比較し、高い耐炭素析出安定性が得られることが見出されている。これは担体中の格子酸素が反応に関与し、メタンがNi上に解離吸着して生成したCHXの酸化及び析出炭素前駆体の酸化除去を促進したためと考えられる。本研究では、H218Oを用いた過渡応答解析により、格子酸素が反応に関与するメカニズムの実証、また、格子酸素の挙動に影響する因子の検討を目的とした。実験では、ペロブスカイト担体として錯体重合法にて調製したLaAlO3, SrTiO3を用いた。これらペロブスカイトにニッケルを担持し触媒とした。反応における過渡応答解析は固定床常圧流通式反応器を用いた。反応は、あらかじめ水素気流で還元した触媒を用いて、反応温度1073 K,で行った。Heで60分間パージした後、CH4/H216O/Ar/He を60分間供給し、CH4/H218O/Ar/Heに切り替えて5分間保持し後、再びCH4/H216O/Ar/Heに切り替え、そのときの過渡応答を四重極形質量分析装置（QMS、HYDEN HAL201）により解析した。　格子酸素によるCH4酸化実験より、触媒活性と、格子酸素によるCHXの酸化速度との間に相関あることが示唆された。また、H2Oからの格子酸素補充の検討を行ったところ、格子酸素の補充には担持金属が大きく影響しており、担持金属が酸化された状態では格子酸素の補充が行われないと考えられる。そして、H218Oを用いた過渡応答解析より、ペロブスカイト担体の格子酸素が反応に関与することが明らかになった。反応温度が高いほど反応に関与する格子酸素量は多いと考えられ、またCHXの酸化により関与すると考えられる。最後に、格子酸素の反応には金属－担体界面が大きく関わっており、Ni粒子径が小さいほど、反応に関与する格子酸素量が多くなることがわかった。