膜反应器中乙苯脱氢制苯乙烯热力学分析  

Thermodynamic analysis of ethylbenzene dehydrogenation to styrene in membrane reactor

作　　者：张超 权文鹏 黄庆 谢勇 周大发 黎小辉 黄风林[1] ZHANG Chao;QUAN Wenpeng;HUANG Qing;XIE Yong;ZHOU Dafa;LI Xiaohui;HUANG Fenglin(College of Chemistry and Chemical Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China)

机构地区：[1]西安石油大学化学化工学院

出　　处：《石油化工应用》2019年第11期97-102,共6页Petrochemical Industry Application

基　　金：西安石油大学大学生创新创业训练计划资助项目“基于原子系数矩阵法的典型石油炼制复杂反应体系的热效应计算”，项目编号：201810705041

摘　　要：本文关注膜反应器中乙苯脱氢生成苯乙烯这一反应体系,通过热力学分析,首先计算了不同条件下,该反应体系的吉布斯自由能变ΔG及平衡常数K。由于膜反应器可实现反应过程中所生成H2的选择性移除分离,从而可打破反应热力学平衡限制,促使平衡向生成反应产物苯乙烯的方向移动,提高乙苯的平衡转化率。因此,本文着重计算分析了H2移出时乙苯平衡转化率的变化情况,并与传统固定床反应器进行了对比分析,印证了膜反应器在促进乙苯脱氢制苯乙烯转化率提高方面的优势。This paper focused on the reaction system of dehydrogenation reaction of ethylbenzene to styrene carried out in membrane reactor.By thermodynamic analysis,the Gibbs free energy changeΔG and equilibrium constant K were calculated under different conditions firstly.Since the membrane reactor can realize the removal and separation of H2 generated during the reaction selectively,which can break the thermodynamic equilibrium limit of the reaction,thus promote the equilibrium to move toward in the direction of styrene,and eventually improve the equilibrium conversion of ethylbenzene.Therefore,the ethylbenzene equilibrium conversion under different removal rate of hydrogen from the reaction system were calculated and analyzed,which was also compared with the traditional fixed bed reactor.The advantages of membrane reactor in promoting the conversion rate of styrene in the reaction system of ethylbenzene dehydrogenation to styrene were proved and verified.

关 键 词：热力学分析 乙苯 脱氢 苯乙烯 膜反应器 

分 类 号：TQ241.21[化学工程—有机化工]