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近年来,化石燃料燃烧产生的二氧化硫(SO_2)对人类健康和生态环境造成严重威胁,如何有效捕集SO_2引起了国内外学者的广泛关注.离子液体作为一种新型绿色溶剂,具有蒸汽压低、液程宽、稳定性好、结构和性质可调节等特殊的性质,在气体分离领域得到了广泛的应用,被视为有前景的SO_2吸收剂.调节离子液体的结构,进一步改善离子液体的捕集性能,使其快速、高效、低耗、可逆地捕集烟气SO_2是研究的关键.本文综述了近年来离子液体捕集SO_2的研究进展,主要内容包括常规离子液体和功能离子液体,其中功能离子液体主要包括有机酸盐离子液体、含酚基阴离子或唑基阴离子的离子液体、含醚基或氨基的离子液体和多功能离子液体.同时,对目前该领域的发展所面临的主要问题和进一步的研究工作提出了建议.
In recent years, the sulfur dioxide (SO_2) produced by the combustion of fossil fuels poses a serious threat to human health and environment, and how to effectively trap SO_2 has aroused widespread concern at home and abroad.As a new type of green solvent, ionic liquids have the advantages of low vapor pressure, Wide range of properties, such as good stability, adjustable structure and properties, are widely used in the field of gas separation and are regarded as promising SO 2 absorbers.It regulates the structure of ionic liquids and further improves the capture of ionic liquids Performance, making it fast, efficient, low-cost, reversible capture of flue gas SO_2 is the key to research.In this paper, the progress of the research on the capture of SO_2 by ionic liquids in recent years is reviewed. The main contents include conventional ionic liquids and functional ionic liquids, Ionic liquids mainly include organic acid salt ionic liquids, ionic liquids containing phenolic anions or oxazolyl anions, ionic liquids containing ether or amino groups, and multifunctional ionic liquids.At the same time, the main problems in the development of this field and Suggestions for further research work