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Improving SO2 capture by tuning functional groups on the cation of pyridinium- based ionic liquids
Alternative TitleRSC Adv.
Zeng, S. J.; He, H. Y.; Gao, H. S.; Zhang, X. P.; Wang, J.; Huang, Y.; Zhang, S. J.
2015
Source PublicationRsc Advances
Issue4Pages:2470-2478
AbstractIn this work, three kinds of novel functionalized ionic liquids (ILs) [NEt2C2Py][SCN], [C4OPy][SCN] and [C4CNPy][SCN] were developed by introducing a tertiary amino group, ether group and nitrile group on the pyridinium cation to improve SO2 absorption performances. Among the investigated ILs, [NEt2C2Py] [SCN] showed the highest absorption capacity of 1.06 gSO(2) gIL(-1) under ambient conditions due to a combination of chemical and physical absorption. By contrast, the enhancement in SO2 capacity by [C4CNPy][SCN] and [C4OPy][SCN] is mainly ascribed to the stronger physical interaction between ILs and SO2 than the conventional IL [C4Py][SCN]. Meanwhile, higher SO2/CO2 selectivity was also obtained using these functionalized ILs, which was increased up to 41% comparing with that of [C4Py][SCN]. Moreover, the effect of water on SO2 capacity and the absorption mechanism were studied. The results indicated that the presence of water caused a slight decrease in SO2 capacity of [C4CNPy][SCN] and [C4OPy][SCN] because of physical absorption, whereas a slight increase in SO2 capacity by [NEt2C2Py] [SCN] due to the formation of hydrogen sulfite salts through chemical absorption. In addition, three kinds of cation-functionalized ILs could remain the stable absorption performance after five cycles of absorption and desorption, implying these ILs show great potentials for SO2 capture.
KeywordCo2 Capture Flue-gas Reversible Capture Highly Efficient Chemical Absorption Sulfur-dioxide Carbon-dioxide Low-viscosity Temperature Solubility
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Indexed BySCI
Language英语
WOS IDWOS:000346188400015
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Cited Times:47[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/11882
Collection研究所(批量导入)
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GB/T 7714
Zeng, S. J.,He, H. Y.,Gao, H. S.,et al. Improving SO2 capture by tuning functional groups on the cation of pyridinium- based ionic liquids[J]. Rsc Advances,2015(4):2470-2478.
APA Zeng, S. J..,He, H. Y..,Gao, H. S..,Zhang, X. P..,Wang, J..,...&Zhang, S. J..(2015).Improving SO2 capture by tuning functional groups on the cation of pyridinium- based ionic liquids.Rsc Advances(4),2470-2478.
MLA Zeng, S. J.,et al."Improving SO2 capture by tuning functional groups on the cation of pyridinium- based ionic liquids".Rsc Advances .4(2015):2470-2478.
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