Solubility of the single gases methane and xenon in the ionic liquid [hmim] [Tf2N]
Solubility of the single gases methane and xenon in the ionic liquid [hmim] [Tf2N]
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DOI：
10.1021/ie070848x
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发表时间：
2007-11-21
影响因子：
4.2
通讯作者：
Maurer, Gerd
中科院分区：
文献类型：
--
作者：
Kumelan, Jacek;Kamps, Alvaro Perez-Salado;Maurer, Gerd
本文报道了两种单一气体（甲烷和氙气）在离子液体1-己基-3-甲基咪唑双（三氟甲基磺酰基）酰胺（[hmim][Tf 2N]）中溶解度的新实验结果。溶解度的测量与高压观察池技术上的合成方法操作。温度范围为293.3 - 413.3 K，最大压力（最大气体摩尔浓度）为9.3 MPa（0.51 mol中心点kg（-1））（甲烷）和9.6 MPa（2.08 mol中心点kg（-1））（氙）。氙显示出显着更高的溶解度比甲烷在所有条件下研究。随着温度的升高，这两种气体在[hmim][Tf 2N]中的溶解度降低。亨利定律的扩展被用来关联溶解度压力。亨利常数的最终结果（零压力下）甲烷和氙的[hmim][Tf 2N]（在摩尔浓度标度上）在实验不确定度内表示（甲烷约1.2%，氙约1%）通过ln（k（H，CH 4）（（0））/MPa）= 6.4929 - 835.9/（T/K）- 0.003471（T/K）和ln（k（H，CH 4）（（0））/MPa）= 6.4929 - 835.9/（T/K）- 0.003471（T/K）计算。（0）/MPa）= 6.3357 - 1321.4/（T/K）- 0.00265（T/K）。
This work reports new experimental results for the solubility of two single gases (methane and xenon) in the ionic liquid 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)amide ([hmim][Tf2N]). The solubility was measured with a high-pressure view-cell technique operating on the synthetic method. The temperature ranged from 293.3 to 413.3 K, and the maximum pressure (the maximum gas molality) was 9.3 MPa (0.51 mol center dot kg(-1)) for methane and 9.6 MPa (2.08 mol center dot kg(-1)) for xenon. Xenon shows a significantly higher solubility than methane at all conditions investigated. Both gases become less soluble in [hmim][Tf2N] with rising temperature. An extension of Henry's law is employed to correlate the solubility pressures. The final results for the Henry's constants (at zero pressure) of methane and xenon in [hmim][Tf2N] (on the molality scale) are represented within the experimental uncertainty (about 1.2% for methane and 1% for xenon) by ln(k(H,CH4)((0))/MPa) = 6.4929 - 835.9/(T/K) - 0.003471(T/K) and ln(k(H,Xe)((0))/MPa) = 6.3357 - 1321.4/(T/K) - 0.00265(T/K), respectively.