Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors  

作　　者：Tengjie Wang Wenkai Li Xuehui Ge Ting Qiu Xiaoda Wang 

机构地区：[1]Engineering Research Center of Reactive Distillation,Fujian Province Higher Education Institutes,College of Chemical Engineering,Fuzhou University,Fuzhou 350108,China Qingyuan Innovation Laboratory,Quanzhou 362801,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第1期243-250,共8页中国化学工程学报（英文版）

基　　金：support for this work from the National Natural Science Foundation of China(21706034);the Natural Science Foundation of Fujian Province(2021J01645);the Key Program of Qingyuan Innovation Laboratory(00221004).

摘　　要：High-purity ethylene carbonate(EC)is widely used as battery electrolyte,polycarbonate monomer,organic intermediate,and so on.An economical and sustainable route to synthesize high-purity ethylene carbonate(EC)via the transesterification of dimethyl carbonate(DMC)with ethylene glycol(EG)is provided in this work.However,this reaction is so fast that the reaction kinetics,which is essential for the industrial design,is hard to get by the traditional measuring method.In this work,an easy-to-assemble microreactor was used to precisely determine the reaction kinetics for the fast transesterification of DMC with EG using sodium methoxide as catalyst.The effects of flow rate,microreactor diameter,catalyst concentration,reaction temperature,and reactant molar ratio were investigated.An activity-based pseudohomogeneous kinetic model,which considered the non-ideal properties of reaction system,was established to describe the transesterification of DMC with EG.Detailed kinetics data were collected in the first 5 min.Using these data,the parameters of the kinetic model were correlated with the maximum average error of 11.19%.Using this kinetic model,the kinetic data at different catalyst concentrations and reactant molar ratios were predicted with the maximum average error of 13.68%,suggesting its satisfactory prediction performance.

关 键 词：Microreactor KINETICS Ethylene carbonate synthesis TRANSESTERIFICATION Sodium methoxide 

分 类 号：TQ225.52[化学工程—有机化工] O643.36[理学—物理化学]