This
study compares the estimations of two predictive approaches,
namely, CP-PC-SAFT and CS-SAFT-VR-Mie for vapor pressures, saturated
and high-pressure densities, sound velocities, isobaric and isochoric
heat capacities of 17 representative substituted fluoro- and chloromethanes,
ethanes, ethenes, propanes, and propenes, whose data are available
under a wide range of conditions. Predictions of vapor–liquid
equilibria (VLE) in their binary systems comprising inter alia carbon
dioxide, hydrocarbons, and light gas systems with k
12 = 0 are considered as well. These models do not incorporate
associative and polar interactions, which allows parametrization based
on the particularly limited amount of literature data. It is demonstrated
that although the overall accuracies of the considered approaches
are reasonably good, each of them has their advantages and disadvantages.
For example, SAFT-VR-Mie typically predicts more accurately some
VLE in the symmetric systems, while CP-PC-SAFT is advantageous in
estimating phase behavior of the asymmetric ones. Both models can
be applied for preliminary estimation of unavailable halocarbon data
for which each of them exhibits a relative superiority. In addition
to this, it is demonstrated that SAFT-VR-Mie attached by square gradient
theory with predictive correlation for influence parameters accurately
estimates surface tensions of the considered compounds.