Methylcyclohexane Dehydrogenation in Catalytic Membrane Reactors for Efficient Hydrogen Production

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• 作者：Gang Li ; Kazuya Yada ; Masakoto Kanezashi ; Tomohisa Yoshioka ; Toshinori Tsuru
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：September 18, 2013
• 年：2013
• 卷：52
• 期：37
• 页码：13325-13332
• 全文大小：370K
• 年卷期：v.52,no.37(September 18, 2013)
• ISSN：1520-5045

文摘

The dehydrogenation of methylcyclohexane (MCH) in catalytic membrane reactors for hydrogen production was studied experimentally and theoretically. The membrane reactor was composed of a Pt/纬-Al₂O₃/伪-Al₂O₃ catalytic support and a H₂-selective silica separation layer, showing H₂ permeances of (1.51鈥?.83) 脳 10^鈥? mol m^鈥? s^鈥? Pa^鈥? with H₂/SF₆ permeance ratios of 290鈥?000 at 473 K. The MCH conversion was markedly increased after hydrogen extraction from the membrane reactor, which agreed very well with the results obtained by simulation using a proposed mathematical model. The effects of the catalytic activity and hydrogen extraction rate on membrane reactor performance were investigated during the simulations. A system combining a fixed-bed prereactor and a membrane reactor was proposed for MCH dehydrogenation, which further improved the MCH conversion as a result of the enhanced driving force for hydrogen extraction from the membrane reactor.