Isothermal P, x, y data for the argon + carbon dioxide system at six temperatures from 233.32 to 299.21 K and pressures up to 14 MPa

Abstract : Isothermal vapor-liquid equilibrium data have been measured for the argon + carbon dioxide binary system at 6 temperatures from 233.32 to 299.21 K, and at pressures from 1.5 to 14 MPa. The triple point temperature of CO 2 (216.58 K) is higher than the Ar critical temperature (150.86 K). As a consequence, working at temperatures higher than the triple point temperature of CO 2, it is not possible to define the vapor pressure of pure Ar and the vapor-liquid equilibrium isotherms will always present a mixture critical point. VLE data have been measured using the "static-analytic" method, taking advantage of two pneumatic capillary samplers (Rolsi™, Armines's patent) designed and developed in the CEP/TEP laboratory. The isothermal P, x, y data are well represented with the Peng-Robinson equation of state combined with Mathias-Copeman alpha function and the Wong-Sandler mixing rules involving the NRTL model.