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Korean Journal of Chemical Engineering, Vol.13, No.2, 129-135, 1996
SOLVENT ACTIVITY COEFFICIENTS AT INFINITE DILUTION IN POLYSTYRENE-HYDROCARBON SYSTEMS FROM INVERSE GAS CHROMATOGRAPHY
Inverse gas chromatography was used to measure activity coefficients of solvents at infinite dilution over a temperature range from 373.15K to 423.15K for monodisperse polystyrene-hydrocarbon systems. Polystyrene has average molecular weight 2.89×105. Solvents include six aliphatic hydrocarbons such as cyclohexane, methylethyl-ketone, n-hexane, carbon tetrachloride, acetonitrile and acetone and three aromatic ones as benzene, toluene and p-xylene. The measured data of activity coefficients of solvents were predicted by UNIFAC-FV model. We, also, pres-ented a modified UNIFAC-FV model by empirically assigning to it a temperature-dependent C parameter in the free volume contribution of the model. Fitted results demonstrated that the modification of the model fitted the experiments better than the original one.
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[Cited By]
- Lee TH, Kim NH, Lee KB, Choi JS, HWAHAK KONGHAK, 38(5), 620, 2000
- Kim NH, Kim SJ, Won YS, Choi JS, Korean Journal of Chemical Engineering, 15(2), 141, 1998
- Kim NH, Kim SJ, Lee KB, Lee MS, Choi JS, Journal of Industrial and Engineering Chemistry, 4(2), 150, 1998
- Park SS, Choi JS, Korean Journal of Chemical Engineering, 20(4), 745, 2003
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