The Catalytic Hydrogenation of Ethylene over Calcium Hydride and the Role of the Hydrogen of the Hydride
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概要
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The catalytic hydrogenation of ethylene over the non-stoichiometric calcium hydride (CaH<SUB>2−δ</SUB>) prepared by means of high-temperature evacuation was studied. The order of introducing gases had no effect on the rate of ethylene hydrogenation. The rate expressions for the initial stage were ν=<I>k</I> <I>P</I><SUB>H</SUB><SUP>0.8–1.0</SUP> <I>P</I><SUB>E</SUB> and ν′=<I>k</I>′ <I>P</I><SUB>H</SUB><SUP>0.8–1.0</SUP> <I>P</I><SUB>E</SUB><SUP>0</SUP> in the lower and higher pressure ranges of ethylene respectively. The amount of hydrogen bound initially to CaH<SUB>2−δ</SUB> and participating in the reaction was estimated from the results of the D<SUB>2</SUB>–CaH<SUB>2−δ</SUB> exchange and H<SUB>2</SUB>–D<SUB>2</SUB> equilibration reactions. From these results, the mechanism of ethylene hydrogenation over calcium hydride and the role of the hydrogen of the hydride were discussed. The poisoning caused by water and acetylene was also studied. Furthermore, the catalytic activity of calcium hydride was compared with that of three metallic hydrides.
- 公益社団法人 日本化学会の論文
著者
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Yamaguchi Masaru
Faculty Of Agriculture Kyoto University
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Tarama Kimio
Department of Hydrocarbon Chemistry, Faculty of Engineering, Kyoto University
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Yamaguchi Masaru
Faculty of Living Science, Kyoto Prefectural University
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Hiraki Yozaburo
Faculty of Living Science, Kyoto Prefectural University
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Wada Masatada
Department of Hydrocarbon Chemistry, Faculty of Engineering, Kyoto University
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