Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Isochoric PVTx Measurements for the Carbon Dioxide + 1,1-Difluoroethane Binary System

Di Nicola, G.[Giovanni], Polonara, F.[Fabio], Santori, G.[Giulio]
J. Chem. Eng. Data 2007, 52, 4, 1258-1261
ABSTRACT
PVTx measurements for carbon dioxide (CO2, R744) + 1,1-difluoroethane (CH3CHF2, 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 (VLE) 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.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C2H4F2 1,1-difluoroethane
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • 1
  • Molar volume, m3/mol ; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • ISOCHOR
  • 86