文献类型：期刊文献

中文题名：丙烷脱氢制丙烯催化剂烧焦过程的模型化

英文题名：Modeling of coke burning-off regeneration for coked propane dehydrogenation catalyst

作者：张新平[1];隋志军[1];周兴贵[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237

年份：2009

卷号：60

期号：1

起止页码：163

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20090811914794);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金重点项目(20736011);教育部创新团队发展计划项目(IRT0721)~~

语种：中文

中文关键词：丙烷脱氢;烧焦;催化剂再生;非均相;数学模型

外文关键词：propane dehydrogenation; coke burning-off; catalyst regeneration; heterogeneous;mathematical model

摘要：在丙烷脱氢制丙烯反应过程中,由于焦的沉积使催化剂活性不断降低,而且失活速度很快,催化剂需频繁烧焦再生。在研究了丙烷脱氢催化剂烧焦过程内外扩散影响的基础上,采用内扩散效率因子修正的均匀烧焦物理模型,建立了综合考虑内外扩散影响的绝热固定床非均相动态烧焦数学模型,用于指导反应器的设计和操作优化。通过对Cr2O3/Al2O3脱氢催化剂烧焦过程模拟,可更深入地认识烧焦过程的变化规律。
In propane dehydrogenation to propene, the catalyst is continuously deactivated owing to coke formation, which needs to be burnt off periodically to regenerate the catalyst. In this paper, an effectiveness factor modified coke burning-off model was used and a dynamic heterogeneous model for the reactor was established, which took into consideration the pore and film diffusion effects. Simulation study showed that there was a large temperature difference between gas and solid. At the beginning of coke burning-off, because the accumulation of reaction heat, the temperature of solid increased rapidly, which was more obvious near the inlet of the reactor. The temperature quickly decreased to the same temperature with gas when the carbon burning was close to completion. Coke burning-off gradually advanced along the bed, and the hot spot of the bed also gradually advanced from inlet to outlet. The hot spot temperature had little change in different bed position.