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1989 Fiscal Year Final Research Report Summary

A Study on Acid-catalysis by Silver-exchanged Zeolites

Research Project

Project/Area Number 62470072
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 工業物理化学
Research InstitutionTokyo Institute of Technology

Principal Investigator

ONO Yoshio  Tokyo Institute of Technology, faculty of engineering Professor, 工学部, 教授 (10016397)

Co-Investigator(Kenkyū-buntansha) SUZUKI Eiichi  Tokyo Institute of Technology, faculty of engineering Research Associate, 工学部, 助手 (90183417)
Project Period (FY) 1987 – 1989
KeywordsAg-exchanged Zeolite / Hydrogen effect / Acid catalysis
Research Abstract

The rate of solid-acid-catalyzed reactions are greatly enhanced by hydrogen present in the system. Thus, the catalytic activities of prereduced silver-exchanged Y-zeolites (AgY) for the disproportionation of ethylbenzene and the isomerization of o-xylene are several times higher than those of hydrogen Y- zeolites, the only in the presence of gaseous hydrogen. The enhancing effect of hydrogen was also observed for isomerization 1-butene and dehydration of alcohols over AgY. The similar enhancing effects of hydrogen on the catalytic activities are observed also in the conversion of methanol into hydrocarbons and the isomerization of 1-butene over prereduced form of silver dodecatungstophosphate.
A dramatic enhancement was observed in the methanol .conversion over the combination catalysts of transition metal (Pd or Pt)-heteropoly acid supported on silica.
Though the catalytic systems are versatile, there are some common features: The enhancement occurs only for acid-catalyzed reactions. The enhancing effect is reversible. The adsorption amount of hydrogen on the catalysts is small. These findings indicate that there is interconversion of molecular hydrogen in the gas phase and protons on the surface, and the activities of the protons induced from gaseous hydrogen are far higher than those of the protons from OH groups in zeolites or from parent heteropoly acids.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Toshihide Baba, Yoshio Ono: "Hydrogen Induced Catalysis by Silver-Exchanged Zeolites:Transformation of Ethylbenzene over AgY Zeolite" Zeolites. 7. 292-294 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toshihide Baba,Yoshio One: "Enhancing Effect of Hydrogen on Acid-Catalyzed Reactions over AgY Zeolites:Dehydration of Alcohols" Stud.Surf.Sci.,. 37. 443-450 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小野嘉夫,馬場俊秀,金江邦彦,徐聖奎: "水素の存在により誘起される固体酸触媒反応" 日本化学会誌. 7. 985-994 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yoshio Ono,Seong Gyu Seo,Toshihide Baba: "Hydrogen-Induced Acid Catalysis over Heterogeneous Catalysts" Catalysis,Concepts and Application,. INV-3. 1-12 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toshihide Baba,Seong Gyu Seo,Yoshio Ono: "Enhancing Effect of Hydrogen on Catalytic Activities of silver-Exchanged Zeolites for Isomerization of 1-Butene" MRS International Meeting on Advanced Materials. 2. 173-183 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toshihide Baba,Yoshio Ono: "Enhancing Effect of Hydrogen on the Catalytic Activity Trisilver Dodecatungstophosphate for the Isomerization of 1-Butene" Appl.Ctal.,. 55. 301-314 (1989)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toshihide Baba, Yoshio Ono: "Hydrogen Induced Catalysis by Silver-Exchanged Zeolites: Transformation of Ethylbenzene over AgY Zeolite" Zeolites, 7, 292-294, 1987.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshihide Baba, Yoshio Ono: "Enhancing Effect of Hydrogen on Acid-Catalyzed Reactions over AgY Zeolites: Dehydration of Alcohols" Stud. Surf. Sci., 37, 443-450, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Ono, Toshihide Baba, Kunihiko Kanae, Seong Gyu Seo: "Hydrogen-Induced Acid Catalysis over Heterogeneous Catalysts," Nippon Kagaku Kaishi, 985-994, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshio Ono, Seong Gyu Seo, Toshihide Baba: "Hydrogen-Induced Acid Catalysis over Heterogeneous Catalysts" Catalysis, Concepts and Application, INV-3, 1-12, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshihide Baba, Seong Gyu Seo, Yoshio Ono: "Enhancing Effect of Hydrogen on Catalytic Activities of Silver-Exchanged Zeolites for Isomerization of 1-Butene" MRS International Meeting on Advanced Materials, 2, 173-183, 1989.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toshihide Baba, Yoshio Ono: "Enhancing Effect of Hydrogen on the Catalytic Activity of Trisilver Dodecatungstophosphate for the Isomerization of 1-Butene" Appl. Catal., 55, 301-314, 1989.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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