Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Vapor liquid equilibria for R22 +N,N-dimethylformamide system at temperatures from 283.15 to 363.15K

He, L. J., Chen, G. M., Cui, X. L.
Fluid Phase Equilib. 2008, 266, 1-2, 84-89
ABSTRACT
Binary vapor liquid equilibrium p T x data were measured for R22 +DMF (N,N-dimethylformamide) system at temperature from 283.15 to 363.15K by the circulating method. The experimental data are correlated by the Peng Robinson Stryjek Vera equation of state using the Wong Sandler mixing rule with NRTL model. The overall deviation of the pressure is 0.57%. The results reveal that the correlated data have a good agreement with the experimental ones. It is shown that the mixture has a large negative deviation from Raoult s law. The vapor liquid equilibrium characteristics of the mixture are expressed in a log p-1/T diagram and pressure composition diagram for use in the analysis of an absorption refrigeration system.
Compounds
# Formula Name
1 C3H7NO dimethylformamide
2 CHClF2 chlorodifluoromethane
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
  • 2
  • Vapor or sublimation pressure, kPa ; Liquid
  • Mole fraction - 2; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • EBULLIO:UFactor:16
  • 80