CIESC Journal ›› 2020, Vol. 71 ›› Issue (1): 361-367.DOI: 10.11949/0438-1157.20191261

• Energy and environmental engineering • Previous Articles     Next Articles

Efficient SO2 capture by ether-containing anion-functionalized ionic liquids

Qiaoxin XIAO(),Wenjun LIN,Haoran LI,Congmin WANG()   

  1. Department of Chemistry, Zhejiang University, Hangzhou 310029, Zhejiang, China
  • Received:2019-10-23 Revised:2019-11-20 Online:2020-01-05 Published:2020-01-05
  • Contact: Congmin WANG

含醚阴离子功能化离子液体高效捕集SO2

肖俏欣(),林文俊,李浩然,王从敏()   

  1. 浙江大学化学系,浙江 杭州 310029
  • 通讯作者: 王从敏
  • 作者简介:肖俏欣(1994—),女,硕士研究生,xqxdream@126.com
  • 基金资助:
    国家自然科学基金项目(21776239);浙江省自然科学基金项目(LZ17B060001)

Abstract:

The development of high efficient, economic and green SO2 absorbers not only has a strong academic value, but also has a good application prospect. Herein, a series of ether-containing anion-functionalized ionic liquids were designed and prepared. The effect of ether on SO2 absorption was investigated. The results indicated that SO2 capacity increased significantly when ether was introduced on the anion. Furthermore, absorption capacity of SO2 did not decrease obviously when the cation with a smaller molar mass tributyl ethyl phosphorus [P4442] was used. The effective absorption capacity of [P4442][2-CH3OPhCOO] was 3.32 mol SO2 per 1 mol IL at 20℃ and 105 Pa, with the effective mass absorption of 0.56 g SO2 per 1 g IL. The cycles of six absorption and desorption showed that SO2 capture by [P4442][2-CH3OPhCOO] was efficient and reversible. The method introducing ether to improve gas capture may be useful for other fields such as separation, catalyst and so on.

Key words: SO2, methoxyl group, functional, ionic liquids, gas capture

摘要:

发展高效、经济、绿色的SO2吸收剂不但具有较强的学术价值,而且有良好的应用前景。设计并制备了一系列含醚的阴离子功能化离子液体,系统地研究了阴离子上引入醚基团对离子液体SO2吸收容量的影响。结果表明,在阴离子的苯环上引入甲氧基,对离子液体的吸收容量有明显提升。当阳离子为摩尔质量更小的三丁基乙基磷[P4442]时,所得离子液体的吸收容量没有明显下降,20℃、105 Pa SO2下,[P4442][2-CH3OPhCOO]有效吸收量为每摩尔离子液体吸收3.32 mol SO2,有效质量吸收量是每克离子液体吸收0.56 g SO2。六次吸收解吸循环,表明[P4442][2-CH3OPhCOO]可以高效可逆地捕集SO2。基于含醚阴离子功能化离子液体的加强效应进行气体捕集的方法,可进一步应用于分离、催化等领域。

关键词: SO2, 甲氧基, 功能化, 离子液体, 气体捕集

CLC Number: