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Title: Application of the GCA-EoS model to the supercritical processing of fatty oil derivatives
Authors: Ferreira, Olga
Macedo, Maria E.
Brignole, Esteban A.
Keywords: Fatty oils
Phase equilibria
Thermodynamic modelling
Issue Date: 2005
Publisher: Elsevier
Citation: Ferreira, Olga; Macedo, Maria E.; Brignole, Esteban A. (2005) - Application of the GCA-EoS model to the supercritical processing of fatty oil derivatives. Journal of Food Engineering. ISSN 0260-8774. 70:4, p. 579-587
Abstract: The group-contribution with association equation of state (GCA-EoS) is applied to represent high-pressure phase equilibria in mixtures of supercritical gases (carbon dioxide, propane) with fatty oil derivatives, such as mono- and di-glycerides, fatty acids and fatty acid esters. Association effects in these mixtures are described by a group-contribution approach using three different association groups: the hydroxyl group, the acid group and the ester group. Satisfactory predictions of vapor–liquid equilibria, liquid–liquid equilibria and c1 of binary and ternary mixtures of high-molecular weight triacyglycerides and their derivatives with carbon dioxide or propane are obtained. It is shown that the GCA-EoS is a powerful engineering tool for the design and optimization of extraction and fractionation processes of fatty oil derivatives with supercritical fluids.
ISSN: 0260-8774
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