Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Vapour + liquid) equilibrium data for the azeotropic {1,1-difluoroethane (R152a) + 1,1,2,2-Tetrafluoroethane (R134)} system at various temperatures from (258.150 to 288.150) K

Guo, H.[Hao], Gong, M.[Maoqiong], Dong, X.[Xueqiang], Wu, J.[Jianfeng]
J. Chem. Thermodyn. 2012, 54, 129-133
ABSTRACT
(Vapour + liquid) equilibrium (VLE) data for the {1,1-difluoroethane (R152a) + 1,1,2,2-Tetrafluoroethane (R134)} system were measured at T = (258.150 to 288.150) K. The experiment is based on a static-analytic method. Experimental data were correlated with the Peng-Robinson equation of state (PR EoS) and the Huron-Vidal (HV) mixing rule involving the NRTL activity coefficient model. The results show good agreement with experimental results for the binary system at each temperature. It was found that the system has a negative azeotropic behaviour within the temperature range measured here.
Compounds
# Formula Name
1 C2H4F2 1,1-difluoroethane
2 C2H2F4 1,1,2,2-tetrafluoroethane
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
  • Closed cell (Static) method
  • 4
  • POMD
  • 1
  • 2
  • Azeotropic pressure, kPa ; Liquid
  • Temperature, K; Gas
  • Liquid
  • Gas
  • By X=Y
  • 4
  • POMD
  • 1
  • 2
  • Azeotropic composition: mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • By X=Y
  • 4
  • POMD
  • 1
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 36
  • POMD
  • 1
  • 2
  • Mole fraction - 1 ; Gas
  • Mole fraction - 1; Liquid
  • Temperature, K; Liquid
  • Gas
  • Liquid
  • Chromatography
  • 36