Abstract
We have demonstrated the capability of the recently reported Group-Interaction Contribution Approach (GIC) (Pardillo-Fontdevila, 1997a) for predicting mixture properties. Up to day GIC approach has been reported exclusively for estimating pure-component properties. As a result: (1) it is reported a new approach for estimating mixture properties without the use of the Analytical-Solution-of-Groups Theory and (2) new models have been met for estimating azeotropic parameters in binary mixtures. New models reported, based on GIC, distinguish between isomers in mixtures. These models give better estimates of the azeotropic parameters if estimates are compared with those obtained by the same equation but using the well-known Group Contribution method. Estimation models reported in this work do not require of correlation equations for pure-component vapour pressures, as well as any equation for activity or fugacity coefficients. No algorithm is necessary for fitting equilibrium and azeotropic points
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