Activity Coefficients at Infinite Dilution of Organic Compounds in Four New Imidazolium-Based Ionic Liquids

• Published in: Journal of chemical and engineering data Vol. 56; no. 7; pp. 3106 - 3114
• Main Authors: Moïse, Jean-Charles, Mutelet, Fabrice, Jaubert, Jean-Noël, Grubbs, Laura M, Acree, William E, Baker, Gary A
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 14.07.2011
• Subjects: Chemical and Process Engineering; Chemical Physics; Chemistry; Engineering Sciences; Exact sciences and technology; General and physical chemistry; General, apparatus; Phase equilibria; Physics; Surface physical chemistry; Water; Gas chromatography; Reversed flow; Infinite dilution; Activity coefficient; Phase equilibrium; Organic compounds; Ionic liquid; INVERSE GAS-CHROMATOGRAPHY; MIXTURES; THERMODYNAMIC PROPERTIES; EQUATION COEFFICIENTS; SOLUTES; FREE-ENERGY RELATIONSHIP; CARBON-DIOXIDE; SOLVATION; WATER; SOLUBILITY
• ISSN: 0021-9568; 1520-5134
• DOI: 10.1021/je200195q

Activity coefficients of 42 to 54 organic compounds in the four ionic liquids (ILs) 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate, 1-butyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide, 1,3-didecyl-2-methylimidazolium bis(trifluoromethylsulfonyl)imide, and 1-ethyl-3-methylimidazolium methanesulfonate were measured using inverse gas chromatography from (312 to 353) K. The retention data were also converted to gas-to-IL and water-to-IL partition coefficients using the corresponding gas-to-water partition coefficients. Both sets of partition coefficients were analyzed using the modified Abraham solvation parameter model. The derived equations correlated the experimental gas-to-IL and water-to-IL partition coefficient data to within average standard deviations of 0.113 and 0.143 log units, respectively.