High-pressure phase behavior of ethane with 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
High-pressure phase behavior of ethane with 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
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DOI：
10.1021/je700691m
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发表时间：
2008-06-01
期刊：
影响因子：
--
通讯作者：
Peters, Cor J.
中科院分区：
文献类型：
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作者：
Florusse, Louw J.;Raeissi, Sona;Peters, Cor J.
在(290至370)K和(0.4至13)MPa的温度和压力范围内测量乙烷气体在双(三氟甲基磺酰基)亚胺1-己基-3-甲基咪唑鎓中的溶解度。结果表明乙烷在该离子液体中具有高溶解度，但低于二氧化碳在相同离子液体中的相应溶解度。例如，乙烷在313K和4MPa下的溶解度在0.3摩尔分数的范围内，而CO2的溶解度在0.5摩尔分数的范围内。气体溶解度随压力增加而随温度降低。对于任何特定的等值线，压力-温度关系都是线性的。然而，压力-组合物溶解度等温线表现出高度弯曲的行为，其中随着压力达到一定的乙烷浓度，溶解度显着增加，超过该浓度，进一步增加压力对乙烷溶解度几乎没有影响。
The solubility of ethane gas has been measured in 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide within a temperature and pressure range of (290 to 370) K and (0.4 to 13) MPa. The results have shown high ethane solubility in this ionic liquid, but lower than the corresponding solubilities of carbon dioxide in the same ionic liquid. For example, the solubility of ethane at 313 K and 4 MPa is in the range of 0.3 mol fraction while that of CO2 is in the range of 0.5 mol fraction. The gas solubilities increase with pressure and decrease with temperature. The pressure-temperature relationship is seen to be linear for any particular isopleth. However, the pressure-composition solubility isotherms show a highly curved behavior in which the solubility increases considerably with pressure up to a certain ethane concentration, above which further pressure increase has little effect on the ethane solubility.