Isochoric PVTx measurements for the carbon dioxide + 1,1-difluoroethane binary system

G. Di Nicola, F. Polonara, G. Santori, R. Stryjek

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

PVTx measurements for carbon dioxide (CO, R744) + 1,1-difluoroethane (CHCHF, R152a) for both the two-phase and the superheated vapor regions are presented. The measurements were taken with a constant volume apparatus at temperatures ranging from (223 to 343) K and pressures from (60 to 3890) kPa along eight isochores. The data obtained in the two-phase region were used to derive vapor-liquid equilibrium (VLB) parameters using a flash method with the Carnahan-Starling-De Santis equation of state (CSD EOS). The dew point was also found for each isochore from the intersection of the P-T sequences. Results from the superheated region were compared with those predicted from the CSD EOS. The complete set of data was also compared with the REFPROP 7.0 prediction.
Original languageEnglish
Pages (from-to)1258-1261
Number of pages4
JournalJournal of Chemical and Engineering Data
Issue number4
Publication statusPublished - 1 Jul 2007


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