文献类型：期刊文献

中文题名：Modeling and Simulation of Coke Combustion Regeneration for Coked Cr2O3/Al2O3 Propane Dehydrogenation Catalyst

英文题名：Modeling and simulation of coke combustion regeneration for coked Cr 2O3/Al2O3 propane dehydrogenation catalyst

作者：Zhang, Xinping[1]; Sui, Zhijun[1]; Zhou, Xinggui[1]; Yuan, Weikang[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2010

卷号：18

期号：4

起止页码：618

中文期刊名：Chinese Journal of Chemical Engineering

外文期刊名：Chinese Journal of Chemical Engineering

收录：CSTPCD;;EI(收录号：20103613219895);Scopus;CSCD:【CSCD2011_2012】；

基金：Supported by the National Natural Science Foundation of China（20736011）; the Ministry of Education of China（IRT0721）

语种：英文

中文关键词：propane dehydrogenation; coke combustion; regeneration; heterogeneous model; simulation

外文关键词：Combustion - Mass transfer - Packed beds - Propane - Dehydrogenation

摘要：A heterogeneous model is developed for the regeneration of the Cr2O3/Al2O3 catalyst for the propane dehydrogenation process by considering the internal mass transfer and external mass/heat transfer during the coke combustion.Simulation shows that under practical operating conditions,multi-steady states exist for the catalyst pellets and the catalyst temperature is sensitive to gas temperature.However,at increased mass flow rate or lowered oxygen concentration,multi-steady states will not appear.Under the strong influences of film diffusion,the coke in the packed bed reactor will first be exhausted at the inlet,while if the film diffusion resistance is decreased,the position of first coke exhaustion moves toward the outlet of the reactor.
A heterogeneous model is developed for the regeneration of the Cr 2O3/Al2O3 catalyst for the propane dehydrogenation process by considering the internal mass transfer and external mass/heat transfer during the coke combustion. Simulation shows that under practical operating conditions, multi-steady states exist for the catalyst pellets and the catalyst temperature is sensitive to gas temperature. However, at increased mass flow rate or lowered oxygen concentration, multi-steady states will not appear. Under the strong influences of film diffusion, the coke in the packed bed reactor will first be exhausted at the inlet, while if the film diffusion resistance is decreased, the position of first coke exhaustion moves toward the outlet of the reactor. ? 2010 Chemical Industry and Engineering Society of China (CIESC) and Chemical Industry Press (CIP).