Characteristics of Decalin Dehydrogenation Catalysis in the Superheated Liquid-Film State for Mobile Storage of Hydrogen

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Efficient hydrogen evolution from decalin by heating at 210°C and cooling at 5°C was attempted in a batch-wise reactor by the use of “superheated liquid-film-type catalysis”. When the carbon-supported metal catalyst 0.75 g was immersed with decalin 3.0 m<I>l</I> under a reactive distillation conditions, a liquid-film state was realized and the catalytic conversion of decalin was remarkably enhanced in contrast to the ordinary suspended state (e.g., 0.75 g/10 m<I>l</I>). Active sites in the liquid-film state were superheated, being higher in temperatures than the boiling point of the substrate solution, which gave the catalytic abilities of both high reaction rates and accelerated desorption of the reaction products from the catalyst surface, as evident from the Langmuir-type analysis. In addition, scarcity of substrate in the liquid-film state improved the utilization efficiency of heat by allotting it more to the endothermic reaction rather than to inevitable evaporation. According to our repetitive reaction test with the same catalyst, reproducible activities were confirmed well. The adoption of superheated liquid-film-type catalysis for decalin dehydrogenation would make the reaction couple with naphthalene hydrogenation useful for mobile storage of hydrogen.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 37(3), 391-398, 2004-03-01

    公益社団法人 化学工学会

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各種コード

  • NII論文ID(NAID)
    10013339735
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6891625
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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