基于ACM丙烷脱氢反应过程的模拟

Simulation of Propane Dehydrogenation in a MovingBed Reactor using Aspen Custom Modeler

利用动力学方程参数,在ACM环境中建立了丙烷脱氢的反应器模型,分析了反应器温度分布、丙烷转化率、反应产物组分沿反应器径向和轴向的变化。将ACM建立的反应器模型封装后导入Aspen中,在Aspen环境中建立了丙烷脱氢反应工段四台串联反应器(1^(#)~4^(#))的流程,分析了反应器出口温度、进料H_(2)/HC对反应过程的影响。分析结果表明,提高3^(#)、4^(#)反应器入口温度对提高丙烷转化效率要高于1^(#)、2^(#)反应器;提高4^(#)反应器入口温度丙烯选择性降低最少,其次是3^(#)反应器。降低进料中H_(2)/HC的比例有利于丙烯的生成,提高丙烯产量,但同时会加速催化剂上焦炭的形成,造成催化剂活性降低,需要对丙烯选择性和催化剂寿命做均衡考虑。

A reactor model for propane dehydrogenation was developed using ACM according to kinetic data,and the results showed that the calculated values were in good consistent with the operation data.According to the reactor model,the reactor temperature distribution,propane conversion,and the variation of reaction product fraction along the radial and axial directions of the reactor were analyzed.The reactor model established by ACM was encapsulated and imported into Aspen plus,and the simulation of propane four series dehydrogenation reaction section(1^(#)~4^(#))was established,and the effects of reactor outlet temperature and H_(2)/HC in the device feed on the reaction process were analyzed.The analysis results showed that increasing the inlet temperature of reactors 3^(#) and 4^(#) was more effective than reactors 1 and 2 in improving propane conversion;increasing the inlet temperature of reactor 4^(#) had the least decrease in propylene selectivity,followed by reactor 3^(#).Lowering the H_(2)/HC in the device feed is beneficial to propylene production and improving propylene yield,but it also accelerate the formation of coke on the catalyst and cause the catalyst activity to decrease,which requires a balanced consideration of propylene selectivity and catalyst life.