This work reports phase equilibrium measurements and thermodynamic modeling of the binary systems (CO 2 + ethyl levulinate) and (CO 2 + levulinic acid). Each composition was carried out in a high-pressure variablevolume view cell at temperatures ranging from 303.15 to 353.15 K and with CO 2 mole fraction ranging from 0.4002 to 0.9751 for the system (CO 2 + ethyl levulinate) and from 0.4083 to 0.9930 for the system (CO 2 + levulinic acid). Under these conditions, only vapor−liquid phase transitions were observed. The experimental data were modeled with the Peng−Robinson cubic equation of state with the Boston− Mathias alpha function (PR-BM) and using the van der Waals quadratic mixing rule. The results showed that the experimental data of the system (CO 2 + ethyl levulinate) were adequately represented by the thermodynamic model with a unique set of binary interaction parameters, which were fitted from all isotherms. Whereas the experimental data of the system (CO 2 + levulinic acid) were only adequately represented with temperature-dependent binary interaction parameters.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.