Measurements of activity coefficients at infinite dilution for organic solutes and water in the ionic liquid 1-butyl-1-methylpyrrolidinium tricyanomethanide
Urszula Domańska-Żelazna , Elena Vadimovna Lukoshko
AbstractThe activity coefficients at infinite dilution, View the MathML sourceγ13∞, for 62 solutes, including alkanes, cycloalkanes, alkenes, alkynes, aromatic hydrocarbons, alcohols, water, thiophene, ethers, ketones, acetonitrile, pyridine and 1-nitropropane in the ionic liquid 1-butyl-1-methylpyrrolidinium tricyanomethanide, [BMPYR][TCM] were determined by gas–liquid chromatography at six temperatures over the range of (318.15 to 368.15) K. The partial molar excess Gibbs free energy, View the MathML sourceΔG1E∞, enthalpy View the MathML sourceΔH1E∞, and entropy term View the MathML sourceTrefΔS1E,∞ at infinite dilution were calculated from the experimental View the MathML sourceγ13∞ values obtained over the temperature range. The densities of [BMPYR][TCM] were measured within temperature range from 318.15 K to 368.15 K. The gas–liquid partition coefficients, KLKL were calculated for all solutes. The values of selectivity for few separation problems as hexane/benzene, cyclohexane/benzene, heptane/thiophene were calculated from View the MathML sourceγ13∞ and compared to literature values for N-methyl-2-pyrrolidinone (NMP), sulfolane, and other ionic liquids based on [BMPYR]+ cation. In comparison with the former measured ILs, [BMPYR][TCM] present quite high selectivity for the separation of aromatic hydrocarbons and aliphatics hydrocarbons, an average capacity for benzene. The data presented here shows that [BMPYR][TCM] ionic liquid can be used as an alternative solvent for the separation of thiophene from the aliphatic hydrocarbons.
|Journal series||Journal of Chemical Thermodynamics, ISSN 0021-9614|
|Publication size in sheets||0.5|
|Keywords in English||Ionic liquid, [BMPYR][TCM], Activity coefficients at infinite dilution, Thermodynamic properties at infinite dilution, Density, Gas–liquid partition coefficients, Separation selectivity and capacity|
|Score|| = 30.0, 28-11-2017, ArticleFromJournal|
= 35.0, 28-11-2017, ArticleFromJournal
|Publication indicators||: 2013 = 2.423 (2) - 2013=2.399 (5)|
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