反应精馏中乙酸甲酯与乙二醇酯交换的模拟  

Simulation for transesterification of methyl acetate with ethylene glycol in reactive distillation process

作　　者：白玉璞[1] 蔡旺锋[1] 张旭斌[1] 

机构地区：[1]天津大学化工学院,天津300350

出　　处：《现代化工》2016年第11期193-196,共4页Modern Chemical Industry

摘　　要：采用拟均相模型拟合了乙酸甲酯与乙二醇酯交换反应的动力学方程。运用Aspen Plus软件对乙酸甲酯与乙二醇在反应精馏中的酯交换反应进行了模拟研究。考虑到能耗问题,该流程采用了差压热耦合技术。重点讨论了进料方式、理论板数和回流比对乙酸甲酯转化率的影响。以年总费用为目标函数,对该流程进行了经济优化。对该流程和传统的双塔流程进行了比较,结果表明,该流程可以节省过程能耗66.09%和年总费用60.61%。The reaction kinetics and process in reactive distillation of the transesterification of methyl acetate with ethylene glycol are described and simulated by pseudohomogeneous model and Aspen Plus, respectively. In consideration of energy consumption,a differential pressure thermally coupled technology is adopted in the process. The influences of design parameters on the conversion of methyl acetate are studied, such as feed mode, the number of theoretical stages and reflux ratio. These parameters are further optimized to minimize the total annual cost. The result shows that, comparing with traditional two columns process, the energy consumption and the annual total cost of the process can be reduced by 66. 09% and 60. 61%, respectively.

关 键 词：乙酸甲酯 酯交换反应 流程模拟 年总费用 热耦合 

分 类 号：TQ028.31[化学工程]