Irregular Ionic Lattice Model for Gas Solubilities in Ionic Liquids

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• 作者：Moonis R. Ally ; Jerry Braunstein ; Ruth E. Baltus ; Sheng Dai ; David W. DePaoli ; and J. M. Simonson
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2004
• 出版时间：March 3, 2004
• 年：2004
• 卷：43
• 期：5
• 页码：1296 - 1301
• 全文大小：100K
• 年卷期：v.43,no.5(March 3, 2004)
• ISSN：1520-5045

文摘

The irregular ionic lattice model (IILM) is applied to predict the vapor pressures and solubilitiesof carbon dioxide dissolved in 1-n-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF₆])and in 1-n-octyl-3-methylimidazolium tetrafluoroborate ([C8mim][BF₄]) ionic liquids at temperatures ranging from 298.15 to 333.15 K. The model contains only two parameters; they areshown to be independent of an arbitrarily chosen reference state. The parameters show a slightdependence on temperature, but this dependence is ignored in computations to demonstratethe rigor of the IILM in predicting CO₂ solubility at high and low pressures at varioustemperatures. Model predictions are compared against the experimental data of Anthony et al.(J. Phys. Chem. B 2002, 106, 7315) and of Blanchard et al. (J. Phys. Chem. B 2001, 105, 2437).The usefulness of the model is in predicting CO₂ solubilities at temperatures and pressureswhere experimental data are unavailable.