Phase behavior prediction for binary volatile-nonvolatile mixtures of N-paraffins

Abstract

The goal of this work is to describe the phase behavior of n-paraffins-supercritical fluid binary systems. The n-paraffins are selected in order to be representative of petroleum fractions. Calculations in the full concentration range and in the vicinity of the mixture critical point, are reported for selected binary systems, for which experimental behavior is known from literature. The calculations are performed by means of the perturbed hard chain and cubic equations-of-state. Pure component parameters of the equations are calculated either from pure component properties or via generalized correlations as a function of a characteristic parameter. The effect of binary interaction parameters and of pure component parameters on mixture properties prediction is also checked.