摘要
二氧化碳和甲醇直接合成碳酸二甲酯反应受热力学平衡限制,导致反应物转化率和产物收率较低,极大地阻碍了其工业化应用。耦合脱水体系能够将反应过程中产生的水及时脱除,促进反应正向进行,进而提高产物碳酸二甲酯收率。根据耦合脱水的原理不同,主要可分为物理耦合脱水和化学耦合脱水。本文综合分析了近年来应用于该反应不同物理脱水工艺和化学脱水剂的研究进展,详细论述了不同脱水体系的脱水原理和对反应的促进作用,并对不同脱水体系的优点及局限进行了归纳和分析,提出通过优化反应工艺或设计新的反应工艺大幅降低反应体系的能耗,同时探索更加廉价、低毒且易循环利用的化学脱水剂是耦合脱水体系今后的主要发展趋势。
The direct synthesis of dimethyl carbonate from carbon dioxide and methanol is limited by thermodynamic equilibrium,resulting in the lower reactant conversion and product yield,which greatly hinders its industrial application.The coupling of dehydration system can remove the water generated in the reaction process timely,and promote the reaction forward,and then improve the yield of dimethyl carbonate.According to the principle of the coupled dehydration system,it can be mainly divided into physical dehydration system and chemical dehydration system.This paper mainly reviews the recent research progress of various physical dehydration processes and chemical dehydrating agents for the synthesis of dimethyl carbonate from CO2 and methanol.The dehydration principles of different systems and their promoting effects on the reaction are discussed in detail.The advantages and limitations of different dehydration systems are summarized and analyzed.It is proposed that the reaction process should be optimized or a new design should be made.Exploring the chemical dehydrating agents which are cheaper,less toxic and easy to recycle are the main development trend of the coupled dehydration system in future.
作者
孙宇辰
张国强
刘斌
李忠
上官炬
刘守军
史鹏政
SUN Yuchen;ZHANG Guoqiang;LIU Bin;LI Zhong;SHANGGUAN Ju;LIU Shoujun;SHI Pengzheng(Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China;Taiyuan Green Coke Energy Co.,Ltd.,Taiyuan 030006,Shanxi,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2019年第11期5127-5135,共9页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(U1510203)
山西省重点研发计划(国际科技合作项目)(201803D421011)
关键词
二氧化碳
催化剂
反应器
碳酸二甲酯
脱水体系
carbon dioxide
catalyst
reactors
dimethyl carbonate
dehydration systems
作者简介
第一作者:孙宇辰(1995-),男,硕士研究生,研究方向为甲醇高效转化合成碳酸二甲酯。E-mail:1270752639@qq.com;通信作者:李忠,教授,博士生导师,研究方向为一碳化学和多相催化。E-mail:lizhong@tyut.edu.cn;通信作者:张国强,讲师,研究方向为甲醇高效转化合成碳酸二甲酯。E-mail:zgq198615@163.com。
