Osmotic coefficients of aqueous solutions of four ionic liquids at T = (313.15 and 333.15) K |
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| Authors: | Bego a Gonz lez, Noelia Calvar, ngeles Domí nguez,Eug nia A. Macedo |
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| Affiliation: | aLaboratory of Separation and Reaction Engineering, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal;bDepartamento de Ingeniería Química, Universidad de Vigo, 36200 Vigo, Spain |
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| Abstract: | Measurements of osmotic coefficients of BmimCl (1-butyl-3-methylimidazolium chloride), HmimCl (1-hexyl-3-methylimidazolium chloride), MmimMeSO4 (1,3-dimethylimidazolium methylsulfate), and BmimMeSO4 (1-butyl-3-methylimidazolium methylsulfate) with water at T = (313.15 and 333.15) K are reported in this work. Vapour pressure and activity data of all the studied binary systems are obtained from experimental data. The osmotic coefficients data are correlated using the extended Pitzer model of Archer and the modified NRTL (MNRTL) model and standard deviations obtained with both models are given too. The parameters obtained with the extended Pitzer model of Archer are used to calculate the mean molal activity coefficients. |
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| Keywords: | Osmotic coefficients Activity Vapour pressure osmometry Ionic liquids |
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