Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Vapor liquid equilibria for the binary system of 1,1-difluoroethane (HFC-152a) + n-butane (R-600) at various temperatures

Lim, J. S.[Jong Sung], Seong, G.[Gimyeong], Byun, H. S.[Hun Soo]
Fluid Phase Equilib. 2007, 259, 2, 165-172
ABSTRACT
Isothermal vapor liquid equilibrium data for the binary systems of 1,1-difluoroethane (HFC-152a) + n-butane were measured at 273.15, 283.15, 293.15, 303.15, 313.15 and 323.15 K, respectively. The experiments were carried out using a circulation-type equilibrium apparatus to measure temperature, pressure, and the compositions of the liquid and vapor phases. The experimental data were correlated with the Peng Robinson equation of state (EOS) using theWong Sandler mixing rules and the Carnahan Starling De Santis equation of state (CSD EOS). Calculated results showed good agreement with experimental data. It was found that this system has very strong positive azeotropes for all the temperature ranges studied here.
Compounds
# Formula Name
1 C2H4F2 1,1-difluoroethane
2 C4H10 butane
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
  • Ebulliometric method (Recirculating still)
  • 6
  • POMD
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 6
  • POMD
  • 1
  • 2
  • Azeotropic pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • By X=Y
  • 6
  • POMD
  • 1
  • 2
  • Azeotropic composition: mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • By X=Y
  • 6
  • POMD
  • 1
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 84
  • POMD
  • 1
  • 2
  • Mole fraction - 1 ; Gas
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Gas
  • Liquid
  • Chromatography
  • 84