Vapor–Liquid Equilibrium Measurements of Binary and Ternary Systems of Carbon Dioxide, Dimethyl Carbonate, Acetonitrile, and Propylene Carbonate

Vapor–liquid equilibria (VLE) of three binary (CO 2 /dimethyl carbonate, CO 2 /propylene carbonate, and CO 2 /acetonitrile) and ternary mixtures (CO 2 /dimethyl carbonate/propylene carbonate, CO 2 /dimethyl carbonate/acetonitrile, and CO 2 /propylene carbonate/acetonitrile) were measured at 313, 333, and 353 K and at pressures up to approximately 200 bar using a variable-volume view cell coupled with gas chromatography (GC) analysis. These measurement results and data collected from earlier works were used to model the phase behavior of these mixtures. Two thermodynamic models were applied to represent the bubble-pressure ( p bubl ) and vapor-phase composition data ( y i ): a cubic equation-of-state/excess Gibbs free energy (CEoS/G E ) model and the statistical associating fluid theory-γ Mie group-contribution (SAFT-γ Mie) equation of state. For the y i data, the Chrastil correlation was…