Collect. Czech. Chem. Commun. 1995, 60, 188-210

Predicting and Calculating Complex Phase Equilibrium in Supercritical Fluid Systems with a New Technique

Roumiana P. Stateva

Department of Chemical Engineering and Chemical Technology, Imperial College, London SW7 2BY, U.K.


A general approach to multiphase equilibrium calculations with particular application to vapour-liquid-liquid and liquid-liquid-liquid systems is presented. The capabilities of the new technique to correctly predict and calculate complex phase equilibrium are tested on five highly non-ideal systems, relevant to supercritical fluid extraction. The thermodynamic models applied are the recently proposed MHV2 model and the Redlich-Kwong-Soave cubic equation of state.