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

Equilibrium Data for the N2O5 + HNO3+ N2O4 System at 258.2 K, 265.2 K, 273.2 K, and 281.2 K

Chen, Z.[Zhiqiang], Wang, L.[Li], Zhu, Y.[Yonggang], Wang, Q.[Qingfa], Zhang, X.[Xiangwen], Mi, Z.[Zhentao]
J. Chem. Eng. Data 2009, 54, 7, 2077-2080
ABSTRACT
Liquid-liquid equilibrium data for the N2O5 + HNO3 + N2O4 system were measured by the cloud point method at 258.2 K, 265.2 K, 273.2 K, and 281.2 K. The solubility of dinitrogen pentoxide in dinitrogen tetroxide and nitric acid, dinitrogen tetroxide in nitric acid, and nitric acid in dinitrogen tetroxide and the tie lines were obtained separately. The single phase region, liquid-liquid equilibrium region, and liquid-solid equilibrium region were determined according to the equilibrium data. With the increase in temperature, the two-phase region reduces, and the solubilities of dinitrogen pentoxide in dinitrogen tetroxide and nitric acid, dinitrogen tetroxide in nitric acid, and nitric acid in dinitrogen tetroxide increase correspondingly.
Compounds
# Formula Name
1 N2O5 dinitrogen pentoxide
2 N2O4 dinitrogen tetroxide
3 HNO3 nitric acid
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
  • 3
  • 1
  • 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 26
  • POMD
  • 3
  • 1
  • 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 20
  • POMD
  • 3
  • 1
  • 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 3
  • Titration method
  • 13
  • POMD
  • 3
  • 1
  • 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Crystal - 1
  • Titration method
  • 14