渗透汽化-蒸馏-酯化反应耦合过程动力学  

Kinetic model of pervaporation-distillation-esterification coupling process

作　　者：阎建民[1] 陈观文[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《膜科学与技术》2002年第5期6-11,共6页Membrane Science and Technology

摘　　要：研究了将渗透汽化与传统的反应蒸馏相结合 ,用于酯化反应脱水的工艺过程 .建立了渗透汽化 -蒸馏 -酯化反应耦合动力学模型 ,并分析了膜面积、蒸发量等因素的影响 .通过实验测定了渗透汽化的脱水速率及酯化反应速度常数和平衡常数 .蒸馏计算程序得到的馏出液组成与实验结果基本一致 .The coupling of an equilibrated reaction with a membrane process is an alternative way to reach complete conversion of reactants. In this work, distillation of reactants coupling with selective pervaporation was used to remove water, a product of the esterification reactions of 1-butanol and acetic acid, to drive the reaction to completion. A model describing the kinetics of system was developed and the influences of different parameters such as the ratios of membrane area to volume of solution, the rate of distillation and the quantity of reflux were studied theoretically on the basis of the described model. Reaction rates contants were determined experimentally and composition of the solution was determined by a gas chromatograph, the experimental data validated the model's prediction in term of water concentrations. Appropriate activities were calculated using the UNIFAC group contribution method.

关 键 词：渗透汽化 蒸馏 酯化反应 耦合过程 动力学 UNIFAC 

分 类 号：TQ028[化学工程]