Vapor-liquid equilibrium data (P, T, x, y) for the binary mixture of carbon dioxide + propylene carbonate were measured on four isotherms from 298.15 K to 373.15 K and at pressures ranging from 41.4 to 206.8 bar (600-3000 psi). Comparisons are made between experimental results and calculations of the Soave-Redlich-Kwong (SRK) cubic equation of state with three interaction parameters. The experimental data of other ester compounds are also modeled with the SRK equation, and the interaction parameters are presented.