Modelling the Vapor-Liquid Equilibria Using Modified van der Waals Family Equations of State

The knowledge of vapor-liquid equilibria (VLE) properties of fluids and fluid mixtures is important for separation processes and production operations including re¿nery and petroleum reservoir industries. Under these circumstances the development of PVT EOSs and PVT correlations for modeling of the VLE properties can be highly useful.Recently Papari et al. [۱] modified van der Waals (vdW) family EOSs to improve their ability to represent the volumetric properties of compressed liquids of various fluids.In this work we employ the revised method developed previously by Chen et al. [۲] and the modified vdW family EOS to model the vapour-liquid equilibrium of non-polar and polar fluids. The modified van der Waals type EOS includes the Scott [۳] and Carnahan-Starling (CS) [۴] repulsion terms.

کلیدواژه ها:

Equation of state ، Fugacity coefficient ، VLE ، Mixing rule