PHASE-EQUILIBRIA MODELING BY THE QUASI-LATTICE EQUATION OF STATE FOR BINARY AND TERNARY-SYSTEMS COMPOSED OF CARBON-DIOXIDE, WATER AND SOME ORGANIC-COMPONENTS

The hole lattice quasichemical group-contribution model (HM) has been applied to describe liquid-liquid, liquid-liquid-vapour and vapour-liq uid equilibria at elevated and high pressures in binary and ternary mi xtures containing CO2, water, alkanols, paraffinic and aromatic hydroc arbons. An estimation of the concentration of alkanol monomers in the binaries with CO2 has been performed. The results of modeling by the H M EOS and the Associated Perturbed Anisotropic Chain Theory (APACT) ar e compared. In most cases both EOS give satisfactory agreement with ex perimental data.