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Control of the structure of intrazeolite metal oxide clusters and their catalytic properties

Research Project

Project/Area Number 09650860
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 触媒・化学プロセス
Research InstitutionShimane University

Principal Investigator

OKAMOTO Yasuaki  Shimane University, Department of Material Science, Professor, 総合理工学部, 教授 (80029553)

Co-Investigator(Kenkyū-buntansha) KUBOTA Takeshi  Shimane University, Department of Material Science, Associate Researcher, 総合理工学部, 助手 (90304253)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1997: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsZeolite / Metal oxide cluster / XAFS / Molecular design / Catalysis / Molybdenum oxide cluster / Iron oxide cluster / Metal sulfide cluster / モリブデン酸化物 / 鉄酸化物 / X線吸収微細構造 / 酸化鉄クラスター / Co-Mo複合硫化物クラスター / 酸化モリブデンクラスター
Research Abstract

Metal oxide catalysts are very important in industry. With supported oxide catalysts, it is well known that their activities and selectivities strongly depend on the support and the amount of loading, It is usually assumed that the dispersion of metal oxide species and, accordingly, the structure of the clusters modify their catalytic performances. However, they are not fully understood yet. It is required to understand the correlations between the structure of surface metal oxide species and their catalytic performances for rational and scientific design of highly efficient catalysts. In the present study, we tried to disclose the correlations between the catalyst performance and the structure of intrazeolite metal oxide clusters, the structure of which is considered to be well defined by confinement in a homogeneous skeleton of the host zeolite. We studied intrazeolite metal sulfide clusters as well. Mo oxide, Fe oxide, Co sulfide, Mo sulfide, and Go-Mo binary sulfide clusters were successfully constructed in zeolite pores, using metal carbonyl techniques. The structure of the clusters was determined by X-ray absorption spectra and FEFF codes. With the oxidation of ethanol, it was found that the activity increases with increasing size of the Mo oxide clusters. It was shown that Fe_6Ox clusters are formed in sodalite cage of the zeolite and that these clusters exhibit high activities for NOx abatement reactions. 'With metal sulfide clusters, it was revealed that Co1Mo_2S_6 clusters possessing a thiocubane structure were produced in the zeolite cages. It was shown that the Co-Mo binary sulfide clusters served a good model of the active sites of industrially paramount hydrotreating catalysts.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Y.Okamoto: "Intrazeoldite Nanocomposite Catalysis : Co-Mo Sulfides for Hydrodesulfurization" AIChE J.43(11). 2809-2819 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: "Preparation and characterization of zeolite-supported molybdenum and cobalt-molybdenum sulfide catalysts" Catalysis Today. 39. 45-59 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Carlsson: "The stracture of Iron Oxide Implanted Zeolite Y, Determined by High Resolution Electron Microscopy Refined with Selected Area Electron Diffra" Chem.Eur.J.5(1). 244-249 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: "Hydrogenation of Butadiene for the Characterization of Co-Mo Sulfide Catalysts" 石油学会誌. 42(2). 107-113 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 岡本康昭: "脱硫触媒の活性サイト構造と分子設計の進歩" 表面. 37(2). 95-107 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: ""Intrazeolite Nanocomposite Catalysis : Co-Mo Sulfides for Hydrodesulfurization"" AIChE J.43 (11). 2809-2819 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: ""Preparation and Characterization of Zeolite-supported Molybdenum and Cobalt-Molybdenum Sulfide Catalysts"" Catalysis Today. 39. 45-59 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Carlsson: ""The Structure of Iron Oxide Impanted Zeolite Y,Determined by High Resoluton Electron Microscopy Refined with Selected Area Electron Diffraction"" Chem, .Eur.J.5 (1). 244-249 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: ""Hydrogenation of Butadiene for the Characterization of Co-Mo Sulfide Catalysts"" Sekiyu Gakkaishi. 42 (2). 107-113 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Okamoto: ""Structure of Active Sites and Molecular Design of Desulfurization Catalysts"" Hyoumen. 37 (2). 95-107 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Carlsson: "The Structure of Iron Oxide Implanted Zeolite Y,Determined by High-Resolution Electron Microscopy and Refined with Selected Area Electron Diffraction" Chem.Eur.J.5(1). 244-249 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 岡本康昭: "脱硫触媒の活性サイト構造と分子設計の進歩" 表面. 37(2)(印刷中). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 岡本康昭: "Hydrogenation of Butadiene for the Characterization of Co-Mo Sulfide Catalysts" 石油学会誌. 42(2). 107-113 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Okamoto: "Preparation and characterization of zeolite-supported molybdenum and cobalt-molybdenum sulfide catalysis" Catalysis Today. 39巻. 45-59 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Okamoto.et al.: "Intrazeolite Nanocomposite Catalysis : Co-Mo Sulfides for Hydrodesulfurization" AIChE Journal. 43(11). 2809-2819 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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