Fluid Phase Equilibria 194–197 (2002) 701–715 Modified solvation model for salt effect on vapor–liquid equilibria

The prediction method had been presented for salt effect on vapor–liquid equilibria by solvation model. This model assumes that salt effect is caused by solvation and solvated solvent molecular cannot contribute to vapor–liquid equilibria. The model took into account the vapor pressure depression in mixed solvent. In this work, the solvation model was modified. The relation between solvation number in pure solvent+ salt system and correlation error was confirmed. Solvation number was determined by using a new relation. As a result, the model was satisfactory applied for all binary solvents+ salt systems. Furthermore, ternary solvents+ salt system was predicted by using solvation number in pure solvent determined from binary solvents+ salt system. Good accuracy was shown. © 2002 Elsevier Science B.V. All rights reserved