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首页> 外文期刊>Fluid Phase Equilibria >CO2 solubility measurement in 1-hexyl-3-methylimidazolium ([HMIM]) cation based ionic liquids
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CO2 solubility measurement in 1-hexyl-3-methylimidazolium ([HMIM]) cation based ionic liquids

机译：在1-己基-3-甲基咪唑鎓（[HMIM]）阳离子型离子液体中的CO2溶解度测量

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In this study, we measured the solubility of carbon dioxide in five different ionic liquids: 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([HMIM][Tf_2N]), 1-hexyl-3-methylimidazolium trifluoromethanesulfonate ([HMIM][TfO]), 1-hexyl-3-methylimidazolium methylsulfate ([HMIM][MeSO_4]), 1-hexyl-3-methylimidazolium tetrafluoroborate ([HMIM][BF_4]) and 1-hexyl-3-methylimidazolium hexafluorophosphate ([HMIM][PF_6]). The temperatures during the experimental measurements ranged from 303.15 to 373.15K in 10K intervals. The solubility of carbon dioxide (CO_2) was determined by measuring the bubble point pressure at a fixed temperature. Experimental data were correlated by using the PR-EoS and Modified-Joback-Reid method. The solubility for all the ionic liquids increased with higher pressure conditions and decreased with higher temperatures. The bubble point pressure increased linearly with increasing temperature at a fixed mole fraction of CO_2. In addition, we investigated the anion exerting influence of the fluorine content on the solubility of carbon dioxide in 5 different ionic liquids in this study. As a result, the solubility of CO_2 in [HMIM][Tf_2N] was found to be the highest, while the solubility of CO_2 in [HMIM][MeSO_4] proved to be the lowest. Furthermore, we also compared the solubility of CO_2 in [HMP]-cation based ionic liquids and examined the solubility data of CO_2 with respect to [C_nmpy][Tf_2N]-based ionic liquid systems. Also, we compared the [HMIM] cation-based ionic liquid systems and the [BMP] cation-based ionic liquid systems. As a result, we concluded that the solubility change depends much more on the anion combination than on the cation combination for the systems studied here.
机译：在这项研究中，我们测量了二氧化碳在五种不同离子液体中的溶解度：1-己基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺（[HMIM] [Tf_2N]），1-己基-3-甲基咪唑三氟甲烷磺酸盐（[HMIM] [TfO]），1-己基-3-甲基咪唑甲基硫酸盐（[HMIM] [MeSO_4]），1-己基-3-甲基咪唑四氟硼酸盐（[HMIM] [BF_4]）和1-己基-3-甲基咪唑六氟磷酸盐（[HMIM ] [PF_6]）。实验测量期间的温度以10K间隔介于303.15至373.15K之间。通过在固定温度下测量起泡点压力来确定二氧化碳（CO_2）的溶解度。实验数据通过PR-EoS和Modified-Joback-Reid方法进行关联。所有离子液体的溶解度均在较高压力条件下增加，并在较高温度下降低。在固定的CO_2摩尔分数下，起泡点压力随温度升高而线性增加。此外，在本研究中，我们研究了氟含量对5种不同离子液体中二氧化碳溶解度产生影响的阴离子。结果，发现CO_2在[HMIM] [Tf_2N]中的溶解度最高，而CO_2在[HMIM] [MeSO_4]中的溶解度最低。此外，我们还比较了CO_2在[HMP]-阳离子基离子液体中的溶解度，并检查了CO_2相对于[C_nmpy] [Tf_2N]基离子液体系统的溶解度数据。此外，我们比较了[HMIM]阳离子型离子液体系统和[BMP]阳离子型离子液体系统。结果，我们得出结论，对于此处研究的系统，溶解度变化更多地取决于阴离子组合，而不是取决于阳离子组合。

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