VAPOR-LIQUID-EQUILIBRIA BY UNIFAC GROUP CONTRIBUTION - REVISION AND EXTENSION

The UNIFAC group contribution method for estimating liquid phase activity coefficients is widely used for phase equilibrium calculations. The accuracy and the range of applicability of the method is determined by the available number of reliable group parameters. New parameters are reported for eight different groups not previously covered by UNIFAC, and some of the previously published parameters have been revised based on new experimental vapor-liquid equilibrium data. The definition of the alcohol group has been modified making UNIFAC easier to use and more reliable for alcohol containing mixtures. © 1979, American Chemical Society. All rights reserved.