Experimental Measurement of Vapor Pressures and Densities at Saturation of Pure Hexafluoropropylene Oxide: Modeling Using a Crossover Equation of State

Moussa Dicko (1) , Ghénima Boukais-Belaribi (2) , Christophe Coquelet (3) , Alain Valtz (3) , Farid Brahim Belaribi (2) , Paramespri Naidoo (4) , Deresh Ramjugernath (4)

1 CEP - Centre Énergétique et Procédés
2 Laboratoire de Thermodynamique et Modélisation Moléculaire
3 CEP/Fontainebleau
4 Thermodynamics Research Unit

Hydrofluoroalkenes, like hexafluoropropylene, can be considered as new working fluids for refrigeration systems and consequently volumetric and critical property data are required. In this study, a vibrating tube densitometer technique was used to determine densities at nine different temperatures between (263 and 358) K, and pressures between (0.04 and 15) MPa. The experimental uncertainties are (0.0003 and (0.0006 MPa for pressure, ( 0.02 K for temperature, ( 0.5% (relative) for vapor densities, and (0.05% for liquid densities. A different equipment based on static method is used for the determination of pure component vapor pressures for temperatures between (231 and 359) K. The experimental uncertainties are (0.0005 MPa for pressure and(0.02 K for the temperature. Critical properties have been determined by direct measurement and also from utilization of experimental densities considering the asymptotic scaling law behavior. The Patel Teja and crossover Patel Teja equations of state are used to correlate the data.

Domaines: Génie des procédés

Moussa Dicko, Ghénima Boukais-Belaribi, Christophe Coquelet, Alain Valtz, Farid Brahim Belaribi, et al.. Experimental Measurement of Vapor Pressures and Densities at Saturation of Pure Hexafluoropropylene Oxide: Modeling Using a Crossover Equation of State. Industrial and engineering chemistry research, 2011, 50 (8), pp.4761-4768. ⟨10.1021/ie102354p⟩. ⟨hal-00590637⟩