酯交换法制备碳酸二甲酯过程模拟与系统火用分析

doi:10.12034/j.issn.1009-606X.218138

过程工程学报 ›› 2018, Vol. 18 ›› Issue (6): 1307-1314.DOI: 10.12034/j.issn.1009-606X.218138

酯交换法制备碳酸二甲酯过程模拟与系统火用分析

陈嵩嵩¹,²,董丽¹,张军平^1,2,成卫国^1*,华炜³

1. 中国科学院过程工程研究所绿色过程与工程重点实验室，北京 100190 2. 中国科学院大学化学化工学院，北京 100049 3. 中石化北京燕山分公司，北京 102500

收稿日期:2018-02-19 修回日期:2018-04-02 出版日期:2018-12-22 发布日期:2018-12-19
通讯作者: 成卫国 wgcheng@ipe.ac.cn
基金资助:
国家自然科学基金资助项目

Process simulation and system exergy analysis for dimethyl carbonate production with transesterification

Songsong CHEN^1,2, Li DONG¹, Junping ZHANG^1,2, Weiguo CHENG^1*, Wei HUA³

1. Key Lab of Green Process and Engineering, Institute of Process Engineering, Chinese Academ of Sciences, Beijing 100090, China 2. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China 3. SINOPEC, Beijing Yanshan Company, Beijing 102500, China

Received:2018-02-19 Revised:2018-04-02 Online:2018-12-22 Published:2018-12-19
Supported by:
The National Natural Science Foundation of China

摘要/Abstract

摘要： 针对酯交换制备过程中甲醇?碳酸二甲酯共沸体系难分离的问题，分别选择变压精馏、碳酸乙烯酯(EC)萃取精馏与乙二醇(EG)萃取精馏3种分离过程进行模拟与能量集成，对比了3种工艺流程的分离能耗，采用有效能(?)分析方法分析了能耗最低的变压分离过程的有效能(?)损失. 结果表明，3种工艺流程的能耗EG萃取精馏>EC萃取精馏>变压精馏，碳酸二甲酯生产过程中内部循环物流能量是输入总能量的1.55倍，变压共沸分离过程的?损失为7.9%。

关键词: 碳酸二甲酯, 共沸物分离, 过程模拟, 系统集成, （火用）分析

Abstract: As a kind of green solvent and chemical intermediate, dimethyl carbonate (DMC) is an important derivation of the downstream production chains of coal chemical industry, methanol (MeOH) chemical industry and CO2 chemical industry. However, the disadvantages of high energy consumption and complicated operation in the current MeOH-DMC azeotrope separation process have greatly restricted the industrial economic benefits. Concentrating on the problems of MeOH?DMC azeotropic system separation in transesterification, the process simulation and energy integration of three azeotrope separation methods had been completed, including pressure-swing distillation method, ethylene carbonate (EC) extractive distillation method and ethylene glycol (EG) extractive distillation method. And the energy consumption of three methods was compared under the same separation target, which was in the following order: EG extractive distillation method>EC extractive distillation method>pressure-swing distillation method. The operation parameters of three kinds of azeotrope separation process were determined by using sensitivity analysis method. And exergy analysis method was adopted to investigate the exergy loss in the pressure-swing azeotrope separating process which had the lowest energy consumption. The results showed that the internal circulation exergy was 1.55 times of the input total exergy in the DMC production process, and the exergy loss was about 7.9%.

Key words: dimethyl carbonate, azeotrope separation, process simulation, system integration, exergy analysis

陈嵩嵩董丽张军平成卫国华炜. 酯交换法制备碳酸二甲酯过程模拟与系统火用分析[J]. 过程工程学报, 2018, 18(6): 1307-1314.

Songsong CHEN Li DONG Junping ZHANG Weiguo CHENG Wei HUA. Process simulation and system exergy analysis for dimethyl carbonate production with transesterification[J]. Chin. J. Process Eng., 2018, 18(6): 1307-1314.

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酯交换法制备碳酸二甲酯过程模拟与系统火用分析

Process simulation and system exergy analysis for dimethyl carbonate production with transesterification

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