Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

(Vapour + liquid + liquid) equilibrium measurements and correlation for the {1,1,1,2-tetrafluoroethane (R134a) + n-butane (R600)} system

Dong, X.[Xueqiang], Zhao, Y.[Yanxing], Gong, M.[Maoqiong], Guo, H.[Hao], Wu, J.[Jianfeng]
J. Chem. Thermodyn. 2015, 84, 87-92
ABSTRACT
was carried out using an apparatus based on the vapour-phase recirculation method at temperatures ranging from (227.127 to 232.817) K. Two numerical methods were used to obtain the second liquid phase compositions coexisting in equilibrium, and good agreement was found between them. The Antoine equation was used to correlate the experimental pressures and temperatures, and no crude random errors were found. Then, all of the experimental results were correlated by the Peng Robison (PR) equation of state (EoS) using the Huron-Vidal (HV) mixing rule combined with the non-random twoliquid (NRTL) activity coefficient model. The vapour phase compositions were calculated using the regressed parameters, which agree well with the experimental values, and the maximum deviation is less than 0.008. Moreover, the study of the relationship between VLLE and VLE for the (R134a + R600) system and the comparison between (R134a + R600) and (R134 + R600a) systems show the internal consistency of the measurements.
Compounds
# Formula Name
1 C2H2F4 1,1,1,2-tetrafluoroethane
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
  • 2
  • 1
  • Upper consolute temperature, K ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Derived from LLE data
  • 1
  • POMD
  • 2
  • 1
  • Upper consolute composition: mole fraction - 1 ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Derived from LLE data
  • 1
  • POMD
  • 2
  • 1
  • Upper consolute pressure, kPa ; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Derived from LLE data
  • 1
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Closed cell (Static) method
  • 32
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Chromatography
  • 32
  • POMD
  • 2
  • 1
  • Mole fraction - 1 ; Gas
  • Temperature, K; Liquid mixture 1
  • Gas
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • 16
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Gas
  • Closed cell (Static) method
  • 16