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化学进展 2011, Vol. 23 Issue (10): 2031-2037 前一篇   后一篇

• 综述与评论 •

离子液体吸收分离SO2

侯玉翠1, 任树行2, 吴卫泽2*   

  1. 1. 太原师范学院化学系 太原 030031;
    2. 北京化工大学 化工资源有效利用国家重点实验室 北京 100029
  • 收稿日期:2011-01-01 修回日期:2011-05-01 出版日期:2011-10-24 发布日期:2011-09-15
  • 作者简介:e-mail:wzwu@mail.buct.edu.cn
  • 基金资助:

    国家自然科学基金项目(No. 20746001)和教育部新世纪优秀人才支持计划项目(No. NCET-08-0710)资助

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Absorption and Separation of SO2 by Ionic Liquids

Hou Yucui1, Ren Shuhang2, Wu Weize2*   

  1. 1. Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, China;
    2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2011-01-01 Revised:2011-05-01 Online:2011-10-24 Published:2011-09-15

离子液体具有极低的挥发性、良好的热稳定性和化学稳定性以及结构性质可调等特点,被认为是一种环境友好的溶剂。由于其结构性质可调,可以设计合成出对SO2有较高溶解能力和选择性的离子液体,在SO2的吸收和分离领域得到了研究者的青睐。本文综述了各种用于分离捕集烟气和混合气体中SO2的离子液体,介绍了它们的结构特点、吸收特性和强化方法,探讨了离子液体脱硫的相关机理,最后对离子液体吸收分离SO2中存在的问题、发展方向和应用前景进行了论述。

关键词： 离子液体, SO2, 分离, 吸收, 机理

Room-temperature ionic liquids (ILs), which have excellent properties, such as extremely low vapor pressure, high thermal and chemical stability and tunable structures, are regarded as environmentally benign solvents. Due to their tunable structures and properties, ILs can be designed to endow with a high solvent power for SO2 absorption and separation, and they have been widely investigated in SO2 absorption and separation by many researchers. The paper briefly introduces the characters of ILs used for SO2 capture and separation from flue gas or mixed gas, the capacity of SO2 absorption in these ILs, the ways to enhance the absorption of SO2, and the mechanism of the absorption. Furthermore, the application prospect of the absorption by ILs is presented, and the existing problems and the further studies are discussed.

Contents
1 Introduction
2 Ionic liquids for absorption and separation of SO2 and their improvements
2.1 Guanidinium based ionic liquids
2.2 Hydroxyl ammonium based ionic liquids
2.3 Imidazolium and pyridinium based ionic iiquids
2.4 Quaternary ammonium based ionic liquids
2.5 Supported ionic liquids
2.6 Polymerized ionic liquids
3 Mechanism of SO2 absorption by ionic liquids
4 Effects of the components of flue gas on desulphurization by ionic liquids
5 Conclusions and outlook

Key words: ionic liquids, SO2, separation, absorption, mechanism

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摘要

离子液体吸收分离SO2