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Advisor(s)
Abstract(s)
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.
Description
Keywords
Fatty oils Phase equilibria Thermodynamic modelling Association Group-contribution
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