Activity Coefficients at Infinite Dilution Measurements for Organic Solutes and Water in the Ionic Liquid 1-Ethyl-3-methylimidazolium Trifluoroacetate

The activity coefficients at infinite dilution, for 29 solutes, alkanes, alkenes, alkynes, cycloalkanes, aromatic hydrocarbons, alcohols and water in the ionic liquid 1-ethyl-3-methylimidazolium trifluoroacetate ([EMIM][TFA]), were determined by gas−liquid chromatography at temperatures from 298.15−368.15 K. The partial molar excess enthalpies at infinite dilution Δ values were calculated from the experimental values obtained over the temperature range. The selectivities for the hexane/benzene and cyclohexane/benzene separation were calculated from and compared to the literature values for other ionic liquids, NMP and sulfolane.