A NON-CUBIC HARD-SPHERE PERTURBED EQUATION OF STATE FOR REPRESENTING PHASE EQUILIBRIA BEHAVIOR OF FLUID MIXTURES

摘要

In a recent paper (Proc. Rom. Acad., Series B, 2003, 1-2, p. 3-10), a new equation of state was proposed, combining a hard-sphere reference model with a general inverse quadratic attractive term, used previously by the author, in a general cubic equation of state (GEOS). The procedure can be generalized for many reference hard-sphere or chain-hard-sphere forms proposed in literature. The main result was the good representation of PVT and phase behaviour of pure fluids. In this work, the equation is extended to mixtures using the Boublik-Mansoori scaled-particle theory and the one-fluid theory. Some examples of applications to vapor-liquid equilibria of binary mixtures are presented.