Experimental measurement of vapor pressures and densities at saturation of pure hexafluoropropylene oxide / Moussa Dicko in Industrial & engineering chemistry research, Vol. 50 N° 8 (Avril 2011)  

Experimental measurement of vapor pressures and densities at saturation of pure hexafluoropropylene oxide : modeling using a crossover equation of state [texte imprimé] / Moussa Dicko, Auteur ; Ghemina Belaribi-Boukais, Auteur ; Christophe Coquelet, Auteur . - 2011 . - pp. 4761–4768.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4761–4768

Mots-clés :	Vapor pressures Oxide Hexafluoropropylene
Résumé :	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.
DEWEY :	660
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie102354p