陽極酸化アルミナ層を担体とした 白金/アルミナプレート状触媒の触媒有効係数 Effectiveness Facotr of Pt/Alumina Plate Type Catalysts Using Anodized Alumina Layer as Catalyst Support

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The effectiveness factor of Pt/Al<sub>2</sub>O<sub>3</sub>/Al plate catalyst was studied experimentally. The Pt/Al<sub>2</sub>O<sub>3</sub> catalyst layer, prepared by anodic oxidation and hot-water treatment, had a porous structure and a narrow pore-size distribution. Catalyst porosity was about 0.5 and the mean pore radius about 2nm. The rate of cyclohexane dehydrogenation reaction increased with the thickness of Pt/Al<sub>2</sub>O<sub>3</sub> catalyst layer to a certain peak, then the effectiveness factor decreased with thickness. This was because reactant diffusion into the catalyst layer was the controlling step. The observed reaction rate per apparent surface area is governed by the effective diffusion coefficient and the reaction rate constant. The reaction rate constant can be improved by augmenting the Pt content and Pt dispersion. The effective diffusion coefficient will be also improved with a large pore radius, which can be realized by controlling the anodized alumina layer pore structure.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan  

    表面技術 = The Journal of the Surface Finishing Society of Japan 47(8), 720-724, 1996-08 

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002257084
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4012582
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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