Evaluation of an improved volume translation for the prediction of hydrocarbon volumetric properties

In the present study the volume translation expression of Ungerer and Batut that is a function of the temperature and molecular weight was evaluated. Instead of being calibrated on the saturated liquid densities, this correlation uses high pressure liquid densities. As a result, it is less sensitive to the inconsistencies shown by other correlations, due to the proximity of the critical region. The mentioned expression is compared to experimental data and with correlations presented by Jhaveri and Youngren, Soreide and Magoulas and Tassios, providing a good prediction of molar volumes at high temperature and pressure and reasonable saturated liquid densities.