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

Isothermal Vapor-Liquid Equilibrium of (Pentafluoroethane + Fluoroethane) at Temperatures between (265.15 and 303.15) K Obtained with a Recirculating Still

Han, X. H., Chen, G. M., Li, C. S., Qiao, X. G., Cui, X. L., Wang, Q.
J. Chem. Eng. Data 2006, 51, 4, 1232-1235
ABSTRACT
The binary mixture refrigerant with (pentafluoroethane + fluoroethane),which in refrigeration nomenclature is R125 + R161, can be considered an alternative refrigerant because it is environmental friendly, has excellent thermodynamic performance, and is safe. (Vapor + liquid) equilibrium (VLE) data for (pentafluoroethane + ethyl fluoride) have been obtained at temperatures of (265.15, 275.15, 283.15, 293.15, 303.15, and 313.15) K. The experimental method used for this study is of the circulation type. Using the Peng-Robinson equation of state combined with the linear combination of the Vidal and Michelsen (LCVM) mixing rules, the modified LCVM mixing rules, and the NRTL model, the VLE data have been correlated. The results reveal that both models have good agreement with existing experimental data obtained by the apparatus. In comparison with the LCVM model, the modified LCVM mixing rule gives much better correlations for the VLE of the binary system (pentafluoroethane + fluoroethane).
Compounds
# Formula Name
1 C2HF5 pentafluoroethane
2 C2H5F fluoroethane
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
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • EBULLIO:UFactor:4
  • 6
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • EBULLIO:UFactor:4
  • 6
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • EBULLIO:UFactor:4
  • 75
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Gas
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Gas
  • Liquid
  • CHROM:UFactor:6
  • 75