High-pressure phase equilibrium data of carbon dioxide/food-relevant systems (2011-2022): Experimental methods, multiphase behavior, thermodynamic modeling, and applications

High-Pressure Phase Behavior of CO2 + (C12/C14 n-Alkane and/or C8/C10 Carboxylic Acid and/or C12/C14 Methyl Ester) Systems

“…Due to the lack of available data for the systems of interest, the thermodynamic modeling of these systems has not been extensively investigated, especially for the ternary systems. The RK-ASPEN equation of state (EOS) has however been used to model binary data for long chain carboxylic acids in CO 2 (and outperformed the cubic plus association model for these systems) and has had great success in modeling CO 2 + 1-alcohol + n -alkane systems (and their binary subsystems). , According to Lanza et al, CO 2 + lipid-like systems (including, carboxylic acid, methyl esters, and triglycerides) are difficult to model predictively, that is, using model parameters obtained from the binary subsystems and predicting the resulting ternary or multicomponent phase behavior . Thus, based on the prior success of the RK-Aspen model for similar systems (systems containing a light gaseous substance with moderately polar solutes that present large size asymmetry) and the known difficulties in predicting the ternary phase behavior based on available binary data, the ability of the RK-Aspen model to predict the ternary phase behavior with parameters regressed using only binary and pure component data will be evaluated.…”