Fluid Phase Equilibria, Vol.218, No.1, 95-101, 2004
Vapor-liquid equilibrium data for the carbon dioxide(CO2) plus difluoromethane (R32) system at temperatures from 283.12 to 343.25 K and pressures up to 7.46 MPa
Isothermal vapor-liquid equilibrium (VLE) data have been measured for the binary system carbon dioxide (CO2) + difluoromethane(R32) at eight temperatures between 283.12 and 343.25 K, and at pressures in the range 1.11-7.46 MPa. The experimental method used in this work is of the static-analytic type, taking advantage of two pneumatic capillary samplers (RolSi(TM), Armines' Patent) developed in the Cenerg/TEP laboratory. The data were obtained with uncertainties within +/-0.02 K, +/-0.002 MPa, and +/-1% for molar compositions. The isothermal P, x, and y data are well represented with the Peng-Robinson equation of state (PR EoS) using the Mathias Copernan alpha function and the Wong-Sandler mixing rules involving the NRTL model. (C) 2003 Elsevier B.V. All rights reserved.