孙铖,刘凡,沈丽,李素静,李伟

• 1:浙江大学生物质化工教育部重点实验室，浙江大学 化学工程与生物工程学院，浙江 杭州 310027

摘要(Abstract)：

针对电厂烟气排放量大、二氧化碳分压相对较低、传统有机胺吸收剂缺陷明显等现状，利用离子液体蒸气压低、物化性质稳定且结构可控等特性，成功合成四甲基铵赖氨酸（[N₁₁₁₁][Lys]）离子液体并将其水溶液用于吸收CO₂，探究其吸收性能、反应机理及动力学。研究结果表明，多氨基功能化离子液体水溶液在吸收中的表现优于单氨基离子液体，[N₁₁₁₁][Lys]的阴离子上不同位置的氨基不会同时与CO₂反应，且不会同时参与后期的水解反应。利用分子模拟技术对反应机理进行了进一步分析发现，N的电负性会影响氨基的CO₂结合能力。此外，[N₁₁₁₁][Lys]离子液体水溶液与CO₂的反应符合快速拟一级反应的假设，对应的表观活化能为23.04 kJ·mol^-1。

关键词(KeyWords)： 离子液体水溶液;二氧化碳吸收;反应机理;分子模拟;动力学

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划（2017YFC0210904）；国家自然科学基金（21476203）。

作者(Author): 孙铖,刘凡,沈丽,李素静,李伟

DOI: 10.3969/j.issn.1003-9015.2020.05.006

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