AN APPLICATION OF THE UNIFAC-RKS METHOD TO A REACTIVE SYSTEM

The simple and predictive method for describing vapour liquid equilibr ia at high pressure and temperature developed previously by the author s and applied to different kinds of binary mixture is extended to the description of ternary mixtures and to a multicomponent reactive syste m. The method is based on the use of the UNIFAC-VIRIAL method for gene rating vapour-liquid equilibrium data of binary systems at moderate pr essures (3-4 atm) and temperatures. The data were then reproduced by t he Redlich-Kwong Soave equation of state and the quadratic mixing rule s. The best fit of the data was obtained by regression analysis of the binary interaction parameters. We observed that these parameters can be used directly at higher pressures and temperatures to describe sati sfactorily the vapour-liquid equilibria of binary and multicomponent m ixtures.