Calculation of liquid-vapor and liquid-liquid equilibrium in multicomponent systems using correlations of equilibrium data

Abstract

An algebraic correlation method to calculate equilibrium data for ternary vapor-liquid equilibrium and quaternary liquid-liquid equilibrium has been proposed. The proposed method allows the calculation of the conjugated phase in equilibrium with a given phase, and the calculation of the two phases in equilibrium from the composition of a heterogeneous global mixture. This method is applied satisfactorily to ternary liquid-vapor equilibrium and type I quaternary liquid-liquid equilibrium.