Modeling and Simulation of Coke Combustion Regeneration for Coked Cr2O3/Al2O3 Propane Dehydrogenation Catalyst

›› 2010, Vol. 18 ›› Issue (4): 618-625.

Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst

张新平, 隋志军, 周兴贵, 袁渭康

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2009-12-31 修回日期:2010-05-19 出版日期:2010-08-28 发布日期:2010-08-28
通讯作者: ZHOU Xinggui, E-mail:xgzhou@ecust.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China(20736011);the Ministry of Education of China(IRT0721)

Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst

ZHANG Xinping, SUI Zhijun, ZHOU Xinggui, YUAN Weikang

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2009-12-31 Revised:2010-05-19 Online:2010-08-28 Published:2010-08-28

摘要/Abstract

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.

关键词: propane dehydrogenation, coke combustion, regeneration, heterogeneous model, simulation

Abstract: 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.

Key words: propane dehydrogenation, coke combustion, regeneration, heterogeneous model, simulation

张新平, 隋志军, 周兴贵, 袁渭康. Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst[J]. , 2010, 18(4): 618-625.

ZHANG Xinping, SUI Zhijun, ZHOU Xinggui, YUAN Weikang. Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst[J]. , 2010, 18(4): 618-625.

参考文献

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Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst

Modeling and Simulation of Coke Combustion Regeneration for Coked Cr₂O₃/Al₂O₃ Propane Dehydrogenation Catalyst

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