Effect of Acetonitrile on the Solubility of Carbon Dioxide in 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)amide
Effect of Acetonitrile on the Solubility of Carbon Dioxide in 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)amide
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DOI：
10.1021/ie0605377
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发表时间：
2006-11
影响因子：
4.2
通讯作者：
G. Hong;J. Jacquemin;P. Husson;M. Gomes;Maggel Deetlefs;M. Nieuwenhuyzen;O. Sheppard;C. Hardacre
中科院分区：
文献类型：
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作者：
G. Hong;J. Jacquemin;P. Husson;M. Gomes;Maggel Deetlefs;M. Nieuwenhuyzen;O. Sheppard;C. Hardacre
在接近大气压的压力下，在290 ~ 335 K温度范围内，实验研究了添加乙腈对二氧化碳在离子液体1-乙基-3-甲基咪唑双（三氟甲磺酰基）酰胺[C2mim][NTf 2]中溶解度的影响。结果表明，CO2在离子液体中的溶解度随乙腈摩尔分数的增加呈线性下降，从303 K时的2.6 × 10-2下降到相同温度下的[C2mim][NTf 2] + CH 3CN（xCH 3CN = 0.77）中的1.3 × 10-2。气体的溶解度随温度的升高而降低，可以计算溶剂化的热力学性质。在相同的温度范围内测量了[C2mim][NTf 2] + CH 3CN混合物的蒸气压，得到了对拉乌尔定律的强烈负偏差：对于xCH 3CN = 0.46的混合物，在334 K时达到36%。在等摩尔组成下，负过量摩尔体积约为−1 cm 3 mol-1，也可能是……
The effect of the addition of acetonitrile on the solubility of carbon dioxide in an ionic liquid, the 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide, [C2mim][NTf2], was studied experimentally at pressures close to atmospheric and as a function of temperature between 290 and 335 K. It was observed that the solubility of carbon dioxide decreases linearly with the mole fraction of acetonitrile from a value of 2.6 × 10-2 in the pure ionic liquid at 303 K to a mole fraction of 1.3 × 10-2 in the mixture [C2mim][NTf2] + CH3CN with xCH3CN = 0.77 at the same temperature. The gas solubility decreases with temperature, and the thermodynamic properties of solvation could be calculated. The vapor pressures of the [C2mim][NTf2] + CH3CN mixtures were measured in the same temperature range, and strong negative deviations from Raoult's law were obtained: up to 36% for a mixture with xCH3CN = 0.46 at 334 K. Negative excess molar volumes of approximately −1 cm3 mol-1 at equimolar composition could also be ...