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 correla tion uses high pressure liquid densities. As a result, it is less sensitive to the inconsistencies shown by other correlations, due to the proximity o f 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. (C) 199 9 Elsevier Science B.V. All rights reserved.