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2006 Fiscal Year Final Research Report Summary

A Study on the Characterization of Hydrodesulfurization Catalysts by Magnetic Properties of Co toward the Development of Highly Active Catalysts

Research Project

Project/Area Number 16360404
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Catalyst/Resource chemical process
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) HIROMITSU Ichiro  Shimane University, Department of Material Science, Professor, 総合理工学部, 教授 (40199138)
KUBOTA Takeshi  Shimane University, Department of Material Science, Research Associate, 総合理工学部, 助手 (90304253)
Project Period (FY) 2004 – 2006
KeywordsHydrodesulfurization Catalysts / Cobalt-Molybdenum Catalysts / Cobalt-Tungsten Catalysts / Boron Addition / Magnetic Properties of Co / Phosphorus Addition / Thermal Stability / CVD
Research Abstract

The salient findings in this research project are as follows:
1. The Co sulfide species in the Co-Mo-S phase show an antiferromagnetic behavior. The magnetic susceptibility of the Co atoms was simulated by a theoretical equation assuming the formation of Co dimmer clusters with Co-S-Co bonding, in conformity with the NO adsorption, which shows the maximum NO adsorption capacity is NO/Co = 1/1 molar ratio. The proposed Co-Mo-S structure was supported by our recent XAFS analysis of CVD-Co/MoS_2 catalysts.
2. The addition of boron to Co-Mo/Al_2O_3 was studied to improve the hydrodesulfurization activity. It was found that the addition of boron increases the TOF by 1.6 times, indicating the ace reactions, accordingly resulting in weaker interactions between Mo oxides and Al_2O_3 surface. The dispersion of MoS_2 was decreased by the addition of boron because of ence in the dispersion of MoS2 particles.
3. The intrinsic activity of the Co-Mo-S structure was increased by sulfiding at a high temperatur-Mo-S structure showed a much less activity because of strong Mo-O-Al bonding. However, the addition of boron decreased the sulfidation temperature for the formation of Type II. The thermal stability of the Co-Mo-S phase was decreased by the addition of boron.
4. Highly dispersed Co sulfide clusters were successfully prepared in zeolite pores using Co(CO)_3NO as a precursor. The structure depended on the type of the host zeolite. It was found that Co sulfide clusters react with zeolite protons to form Co2+ cations liberating H_2S. The hydrodesulfurization activity of the Co_sulfide clusters depended on the structure and residual OH groups.
5. It is proposed that highly active hydrotreating catalysts are prepared by synthesizing highly dispersed Co-Mo-S Type II by modifying the interactions between MoS_2 particles and support surface. Simultaneous use of boron and chelating agents will be very effective for the developments of highly active ultra-deep hydrodesulfurization catalysts.

  • Research Products

    (26 results)

All 2007 2006 2005 2004

All Journal Article (26 results)

  • [Journal Article] Effect of Boron Addition on the Surface Structure of Co-Mo/Al_2O_3 Catalysts2007

    • Author(s)
      Usman
    • Journal Title

      J. Catal. 247

      Pages: 78-85

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Boron Addition on the Surface Structure of Co-Mo/Al_2O_3 Catalysts2007

    • Author(s)
      Usman, Takeshi Kubota, Ichiro Hiromitsu, Yasuaki Okamoto
    • Journal Title

      J. Catal. 247

      Pages: 78-85

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Boron Addition on the Intrinsic Activity of Al_2O_3-supported Co-W and Co-Mo Sulfide Catalysts for the Hydrodesulfurization of Thiophene2006

    • Author(s)
      Usman
    • Journal Title

      Bull. Chem. Soc. Jpn. 79

      Pages: 637-643

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Thermal Stability of the Co-Mo-S Sturucture as Studied bu a CVD Technique using Co(CO)_3NO2006

    • Author(s)
      Usman
    • Journal Title

      Ind. Eng. Chem. Res. 45

      Pages: 3537-3543

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Characterization of Highly Dispersed Cobalt Sulfide Catalysts by X-Ray Absorption Fine Structure and Magnetic Propoerties2006

    • Author(s)
      Takeshi Kadono
    • Journal Title

      Appl. Catal. A, General 312

      Pages: 125-133

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Boron Addition on the Intrinsic Activity of Al_2O_3-supported Co-W and Co-Mo Sulfide Catalysts for the Hydrodesulfurization of Thiophene2006

    • Author(s)
      Usman, Takeshi Kubota, Yasuaki Okamoto
    • Journal Title

      Bull. Chem. Soc. Jpn. 79

      Pages: 637-643

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Thermal Stability of the Co-Mo-S Structure as Studied by a CVD Technique using Co(C0)_3NO2006

    • Author(s)
      Usman, Takeshi Kubota, Yasuaki Okamoto
    • Journal Title

      Ind. Eng. Chem. Res. 45

      Pages: 3537-3543

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Characterization of Highly Dispersed Cobalt Sulfide Catalysts by X-ray Absorption Fine Structure and Magnetic Properties2006

    • Author(s)
      Takeshi Kadono, Takeshi Kubota, Ichiro Hiromitsu, Yasuaki Okamoto
    • Journal Title

      Appl. Catal. A General 312

      Pages: 125-133

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Structure of the Active Sites of Co-Mo Hydrodesulfurization Catalysts as Studied by Magnetic Susceptibility Measurement and NO Adsorption2005

    • Author(s)
      Yasuaki Okamoto
    • Journal Title

      J. Phys. Chem. B 109

      Pages: 288-296

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study of the Probe Molecule Adsorption on Co-Mo Sulfide Model Catalysts by means of XANES and FT-IR2005

    • Author(s)
      Takeshi Kubota
    • Journal Title

      Phys. Script. T115

      Pages: 667-670

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Boron Addition on a MoO_3/Al_2O_3 Catalyst : Physicochemical Characterisation2005

    • Author(s)
      Usman
    • Journal Title

      Appl. Catal. A, General 286

      Pages: 148-154

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Intrinsic Catalytic Activity of SiO_2-supported Co-Mo and Co-W Sulfide Catalysts for the Hydrodesulfurization of Thiophene2005

    • Author(s)
      Yasuaki Okamoto
    • Journal Title

      J. Catal. 233

      Pages: 16-25

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Edge Dispersion of Supported MoS_2 and WS_2 Catalysts as Evaluated by using Co(CO)_3NO as a Probe Molecule2005

    • Author(s)
      Takeshi Kubota
    • Journal Title

      Appl. Catal. A, General 290

      Pages: 17-24

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Effect of Boron Addition and Presulfidation Temperature on the HDS Activity of a Co-Mo/Al_2O_3 Catalyst2005

    • Author(s)
      Usman
    • Journal Title

      Indo. J. Chemistry 5

      Pages: 77-82

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Co-WS_2 Hydrodesulfurization Catalysts : An Unexpected More Favorable Combination than Co-MoS_22005

    • Author(s)
      Yasuaki Okamoto
    • Journal Title

      Chem. Lett. 34

      Pages: 1258-1259

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Thermal Stability of Al_2O_3-Supported Co-Mo-S Active Sites : Real Thermal Stability Separated from Sintering of MoS_2 Particles2005

    • Author(s)
      Usman
    • Journal Title

      Chem. Lett. 34

      Pages: 1358-1359

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] The Structure of the Active Sites of Co-Mo Hydrodesulfurization Catalysts as Studied by Magnetic Susceptibility Measurement and NO Adsorption2005

    • Author(s)
      Yasuaki Okamoto, Masatoshi Kawano, Taka< Kawabata, Takeshi Kubota, Ichiro Hiromitsu
    • Journal Title

      J. Phys. Chem. B 109

      Pages: 288-296

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study of the Probe Molecule Adsorption on Co-Mo Sulfide Model Catalysts by means of XANES and FT-IR2005

    • Author(s)
      Takeshi Kubota, Masatoshi Kawano, Yasuaki Okamoto
    • Journal Title

      Phys. Script. T115

      Pages: 667-670

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of Boron Addition on a MoO_3/Al_2O_3 Catalyst : Physicochemical Characterization2005

    • Author(s)
      Usman, Mayu Takaki, Takeshi Kubota, Yasuaki Okamoto
    • Journal Title

      Appl Catal. A, General 286

      Pages: 148-154

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Intrinsic Catalytic Activity of SiO_2-supported Co-Mo and Co-Sulfide Catalysts for the Hydrodesulfurization o Thiophene2005

    • Author(s)
      Yasuaki Okamoto, Akira Kato, Usman, Kenji Sato, Ichiro Hiromitsu, Takeshi Kubota
    • Journal Title

      J. Catal. 233

      Pages: 16-25

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Edge Dispersion of Supported MoS_2 and WS_2 Catalysts as Evaluated by Using Co(CO)_3NO as a Probe Molecule2005

    • Author(s)
      Takeshi Kubota, Kenji Sato, Akira Kato, Usman, Takeshi Ebihara, Takashi Fujikawa, Yasuhiro Araki, Katsuaki Ishida, Yasuaki Okamoto
    • Journal Title

      Appl. Catal. A, General 290

      Pages: 17-24

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] The Effect of Boron Addition and Presulfidatioi Temperature on the HDS Activity of a Co-MoS_2/Al_2O_3 Catalyst2005

    • Author(s)
      Usman, Takeshi Kubota, Yasuaki Okamoto
    • Journal Title

      Indonesian J. Chemistry 5

      Pages: 77-82

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Co-WS_2 Hydrodesulfurization Catalysts : An Unexpected More Favorable Combination than Co-MoS_22005

    • Author(s)
      Yasuaki Okamoto, Akira Kato, Usman, Kenji Sato, Takeshi Kubota
    • Journal Title

      Chem. Lett. 34

      Pages: 1258-1259

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Thermal Stability of Al_2O_3-Supported Co-Mo-S Active Sites : Real Thermal Stability Separated from Sintering of MoS_2 Particles2005

    • Author(s)
      Usman, Takeshi Kubota, Yasuaki Okamoto
    • Journal Title

      Chem. Lett. 34

      Pages: 1358-1359

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 高活性水素化脱硫触媒のモデル化とkyラクタリゼーション2004

    • Author(s)
      岡本康昭
    • Journal Title

      硫酸と工業 57

      Pages: 129-139

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Model of Highly Active Hydrodesulfurization Catalysts and Characteriza-tion2004

    • Author(s)
      Yasuaki Okamoto
    • Journal Title

      Sulfuric Acid and Industry 57

      Pages: 129-139

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

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Published: 2008-05-27  

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