文献类型：期刊文献

英文题名：Regulation of Catalytic Reaction via Vapor-Phase Condensation. 1. Experimental Study on the Reaction Rate Hysteresis Loops

作者：Yu, Ye-Mao[1];Cheng, Zhen-Min[1];Zhou, Zhi-Ming[1];Wu, Si-Cao[1];Liu, Peng[1];Jin, Jian[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：51

期号：26

起止页码：8735

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20122815233007);WOS:【SCI-EXPANDED(收录号:WOS:000305880000005)】；

基金：Financial support from Natural Science Foundation of China (20876043 and 21076072) is gratefully acknowledged.

语种：英文

外文关键词：Benzene - Condensation - Catalysts - Catalysis - Wetting - Hysteresis loops - Reaction rates

摘要：To experimentally verify the existence of reaction rate hysteresis in the gas phase operation due to capillary condensation, benzene hydrogenation was carried out in a fixed bed under isothermal condition. Through changing the flow rate of benzene and cyclohexane mixture in a sequence from low to high and then vice versa, a group of distinctive conversion profiles was obtained. By plotting the reaction rate against the relative vapor pressure, hysteresis loops in reaction rate are confirmed to exist. It was observed the reaction rate kept nearly constant in the region of p/p(0) < 0.6 and decreased rapidly in the region of p/p(0) > 0.8. In providing an intrinsic understanding on the influence of vapor condensation on the reaction rate of a partially wetted catalyst, the reaction rate and internal effectiveness factor are plotted against the catalyst wetting fraction, from which a new correlation between the overall reaction rate and catalyst wetting fraction was proposed.