Isothermal vapor-liquid equilibrium data for the ethylene + 1,1,2,3,3,3-hexafluoro-1-propene binary system between 258 and 308 K at pressures up to 4.56 MPa

Shalendra C. Subramoney (1) , Xavier Courtial (1) , Paramespri Naidoo (1) , Christophe Coquelet (1, 2) , Dominique Richon (1) , Deresh Ramjugernath (1)

1 Thermodynamics Research Unit
2 CTP - Centre Thermodynamique des Procédés

Isothermal vapor-liquid equilibrium data are reported for ethylene + 1,1,2,3,3,3-hexafluoro-1-propene mixtures at six temperatures in the 258.35-307.38 K range, and pressures up to 4.56 MPa. The experimental data were measured using an apparatus based on the "static-analytic" method equipped with a movable ROLSI™ capillary sampler for repeatable and reliable equilibrium phase sampling and handling. The isothermal P-x-y data are well correlated with a model comprised of the Peng-Robinson equation of state containing the Mathias-Copeman alpha function, Wong-Sandler mixing rule, and NRTL local composition model. The combined model is termed "PR-MC-WS-NRTL". The studied system does not exhibit azeotropic behavior nor liquid-liquid immiscibility over the range of investigated temperatures. Mixture critical points are calculated from the experimental vapor-liquid equilibrium data via the extended scaling laws and the PR-MC-WS-NRTL model, and are found to be in good agreement with the experimental isothermal phase envelopes.

Mots clés: Static-analytic" method; ROLSI™; 1; Vapor-liquid equilibria; VLE; "Static-analytic" method; ROLSI™; 3-Hexafluoro-1-propene; Hexafluoropropylene; R-1216; Fluorocarbon

Domaines: Génie des procédés

Shalendra C. Subramoney, Xavier Courtial, Paramespri Naidoo, Christophe Coquelet, Dominique Richon, et al.. Isothermal vapor-liquid equilibrium data for the ethylene + 1,1,2,3,3,3-hexafluoro-1-propene binary system between 258 and 308 K at pressures up to 4.56 MPa. Fluid Phase Equilibria, 2013, 353, pp.7-14. ⟨10.1016/j.fluid.2013.05.018⟩. ⟨hal-00876966⟩