Analysis of mechanism of ethylene hydrogenation by hydrogen permeating palladium membrane.
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概要
- 論文の詳細を見る
A hydrogenation reactor with palladium as a catalytic membrane permeated by hydrogen was designed and the mechanism of the hydrogenation of ethylene was analyzed. It was demonstrated by experiment that, where the resistance of mass transfer in the gas film can be neglected, the range of ethylene partial pressure was distinctly separated into two domains: one domain where the overall reaction rate is approximately proportional to the ethylene partial pressure and another where the overall rate is equal to the permeation rate of hydrogen into vacuum at constant hydrogen pressure. The analysis demonstrated that the two domains correspond to the chemical reaction limitation and the limitation of hydrogen diffusion through the membrane, respectively. It was also demonstrated that the distinct separation of the domains is due to the large value of k0/ki, , which is the ratio of the rate constants of hydrogen dissolution into and out of the palladium membrane. In addition, it was demonstrated that the permeatation rate is scarcely affected by a change in reaction rate under a certain condition. This was in good agreement with the experimental results.
- 公益社団法人 化学工学会の論文
著者
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Inoue Hakuai
Department Of Bioengineering Soka University
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Nagamoto Hidetoshi
Department of Chemical Engineering, Faculty of Engineering, The University of Tokyo
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NAGAMOTO HIDETOSHI
Department of Chemical Engineering, University of Tokyo
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