高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (9): 1578.doi: 10.7503/cjcu20170117

• 有机化学 • 上一篇    下一篇

双功能离子液体的合成及二氧化碳捕集性能

孙丽伟, 骆静宜, 唐韶坤()   

  1. 天津大学化工学院, 绿色合成与转化教育部重点实验室,天津化学化工协同创新中心, 天津 300072
  • 收稿日期:2017-02-25 出版日期:2017-09-10 发布日期:2017-06-12
  • 作者简介:联系人简介: 唐韶坤, 女, 博士, 教授, 博士生导师, 主要从事功能材料的合成与应用研究. E-mail: shktang@tju.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21328601)资助

Synthesis of Dual-functionalized Ionic Liquid and Application in CO2 Absorption

SUN Liwei, LUO Jingyi, TANG Shaokun*()   

  1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering & Technology, Collaborative Innovation Center of Chemical Center of Chemical Science and Engineering(Tianjin), Tianjin University, Tianjin 300072, China
  • Received:2017-02-25 Online:2017-09-10 Published:2017-06-12
  • Contact: TANG Shaokun E-mail:shktang@tju.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21328601)

摘要:

采用两步法合成了新型功能化离子液体1-甲氧基乙基-3-甲基咪唑甘氨酸([C3O1mim][Gly]), 并研究了其对CO2的吸收性能. 利用核磁共振、 红外光谱及热重分析等手段进行表征, 验证了该离子液体的结构, 且发现其具有较高的热稳定性. 对比单乙醇胺(MEA), 考察了[C3O1mim][Gly]在不同温度下对CO2的捕集能力, 结果表明, [C3O1mim][Gly]在40 ℃下的吸收容量可达1.26 mol CO2/mol IL, 远高于MEA, 这表明[C3O1mim][Gly]对CO2具有良好的吸收能力, 吸收容量随着温度升高而降低. 该离子液体同时具有良好的循环稳定性, 进行5次吸收解吸操作后仍可保持较高的CO2吸收量. 对该离子液体吸收CO2进行了动力学研究, 结果表明, Pseudo-second-order模型能够较好地描述该吸收过程.

关键词: 离子液体, 二氧化碳, 吸收, 动力学模型

Abstract:

A new bifunctional ionic liquid was prepared, characterized and applied in the absorption and desorption of CO2. First, 1-methoxyethyl-3-methyl imidazolium glycinate([C3O1mim][Gly]) was synthesized by two-step method. The molecular structure was characterized and confirmed by 1H, 13C nuclear magnetic resonance(NMR) and Fourier transform infrared(FTIR) spectroscopy. And thermogravimetric(TG) analysis suggested that [C3O1mim][Gly] had good thermal stability. Then, compared to monoethanolamine(MEA), the CO2 absorption capacity of [C3O1mim][Gly] was studied in the range of 25—100 ℃ at normal pressure. By computation, the CO2 absorption capacity can reach 1.26 mol CO2/mol IL at 40 ℃, which is greatly higher than that of monoethanolamine(0.54 mol CO2 /mol MEA). And absorption capacity of CO2 in [C3O1mim][Gly] would decrease with the increase of temperature from 40 ℃ to 100 ℃. Furthermore, the ionic liquid exhibited excellent reversibility and CO2 absorption capacity can be maintained after 5 times of absorption-desorption circulation. Finally, the absorption kinetics of CO2 in [C3O1mim][Gly] was studied at 40 ℃. And Pseudo-second-order model is good to describe CO2 absorption in [C3O1mim][Gly].

Key words: Ionic liquid, Carbon dioxide, Absorption, Kinetic modeling

中图分类号: 

TrendMD: