Revision and summary of the group contribution equation of state parameter table: Application to edible oil constituents

The Group Contribution Equation of State (GC-EoS) was developed by Skjold-Jorgensen in 1984 for predicting phase equilibria of non-polar and polar mixtures. Since the model development, theGC-EoS group parameter table has been revised and extended, and the predictive capability of the model has been widely spread. Furthermore, the model has been successfully applied in the phase equilibria modeling of separation processes, particularly those related with supercritical fluids, and has also been used as a predictive tool for process simulation and optimization. This work is a comprehensive review of the present status of the GC-EoS parameter table, including revisions and extensions carried out by different authors since the model development until present. For a better understanding, available parameters are reported and organized in adequate tables. Additionally, the parameters for the carboxylic acid (COOH) group, which allow the modeling of an important family of compounds, i.e. carboxylic acids, are included in the present work. The application of the model to represent phase equilibria in mixtures of carbon dioxide and the main constituents of edible oils and derived products, demonstrate the capability of the model to be used in supercritical fluid oil-process simulation and optimization. (c) 2007 Elsevier B.V. All rights reserved.