(Vapor + liquid) equilibrium data for (carbon dioxide + 1,1-difluoroethane) system at temperatures from (258 to 343) K and pressures up to about 8 MPa

Hakim Madani (1) , Alain Valtz (2) , Christophe Coquelet (2) , Abdeslam-Hassen Meniai (1) , Dominique Richon (2)

1 LIPE - Laboratoire de l'Ingénierie des Procédés de l'Environnement
2 CEP/Fontainebleau

Accurate thermo-physical data are of utmost interest for the development of new efficient refrigeration systems. Carbon dioxide (R744) and 1,1-difluoroethane (R152a) are addressed here. Isothermal (vapor + liquid) equilibrium data are reported herein for (R744 + R152a) binary system in the (258-343) K temperature range and in the (0.14 to 7.65) MPa pressure range. A reliable "static-analytic" method taking advantage of two online ROLSI™ micro capillary samplers is used for all thermodynamic measurements. The data are correlated using our in-house ThermoSoft thermodynamic model using the Peng-Robinson equation of state, the Mathias-Copeman alpha function, the Wong-Sandler mixing rules, and the NRTL model

Mots clés: Vapors; Critical point; Phase diagrams; R152a; R744; Refrigerants; Supercritical gas solubility; VLE data; Computer networks; Equations of state; Oxides; Refrigerating machinery; Refrigeration; Thermodynamics

Domaines: Génie des procédés

Hakim Madani, Alain Valtz, Christophe Coquelet, Abdeslam-Hassen Meniai, Dominique Richon. (Vapor + liquid) equilibrium data for (carbon dioxide + 1,1-difluoroethane) system at temperatures from (258 to 343) K and pressures up to about 8 MPa. Journal of Chemical Thermodynamics, 2008, 40 (10), pp.1490-1494. ⟨10.1016/j.jct.2008.06.002⟩. ⟨hal-00798921⟩