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

doi:10.1016/j.cjche.2022.02.019

中国化学工程学报 ›› 2023, Vol. 53 ›› Issue (1): 243-250.DOI: 10.1016/j.cjche.2022.02.019

• Full Length Article • 上一篇下一篇

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

Tengjie Wang, Wenkai Li, Xuehui Ge, Ting Qiu, Xiaoda Wang

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

收稿日期:2021-10-23 修回日期:2022-02-13 出版日期:2023-01-28 发布日期:2023-04-08
通讯作者: Ting Qiu,E-mail:tingqiu@fzu.edu.cn;Xiaoda Wang,E-mail:xdwang@fzu.edu.cn
基金资助:
We acknowledge the financial support for this work from the National Natural Science Foundation of China (21706034), the Natural Science Foundation of Fujian Province (2021J01645), and the Key Program of Qingyuan Innovation Laboratory (00221004).

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

Tengjie Wang, Wenkai Li, Xuehui Ge, Ting Qiu, Xiaoda Wang

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

Received:2021-10-23 Revised:2022-02-13 Online:2023-01-28 Published:2023-04-08
Contact: Ting Qiu,E-mail:tingqiu@fzu.edu.cn;Xiaoda Wang,E-mail:xdwang@fzu.edu.cn
Supported by:
We acknowledge the financial support for this work from the National Natural Science Foundation of China (21706034), the Natural Science Foundation of Fujian Province (2021J01645), and the Key Program of Qingyuan Innovation Laboratory (00221004).

摘要/Abstract

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 pseudo-homogeneous 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

Abstract: 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 pseudo-homogeneous 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.

Key words: Microreactor, Kinetics, Ethylene carbonate synthesis, Transesterification, Sodium methoxide

Tengjie Wang, Wenkai Li, Xuehui Ge, Ting Qiu, Xiaoda Wang. Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors[J]. 中国化学工程学报, 2023, 53(1): 243-250.

Tengjie Wang, Wenkai Li, Xuehui Ge, Ting Qiu, Xiaoda Wang. Kinetics measurement of ethylene-carbonate synthesis via a fast transesterification by microreactors[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 243-250.

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

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