Phase Equilibria by effective UNIFAC group-contribution method

A group-contribution method similar to the UNIFAC model is presented for the estimation of liquid phase activity coefficients. The method is based on an extension of the effective UNIQUAC equation, which represents well vapor—liquid equilibria of alcohol-saturated hydrocarbon mixtures with two parameters. Group-interaction parameters for 35 groups are obtained from experimental vapor—liquid equilibrium and solubility data. Activity coefficients...