Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubilities and partial molar volumes of N,N0-dibutyl-oxalamide, N,N0-dihexyl-oxalamide, N,N0-dioctyl-oxalamide in supercritical carbon dioxide

Luo, J.[Jie], Yang, H.-J.[Hai-Jian], Jin, J.[Jing], Chang, F.[Fei]
J. Chem. Thermodyn. 2012, 54, 339-345
ABSTRACT
Three new potent CO2-philic compounds were synthesized and their structures were characterized by FTIR, NMR, and elemental analysis. The solubility of the three compounds in supercritical CO2 was determined at T = (313 to 353) K from 9.1 MPa to 15.0 MPa. The experimental data were correlated with two density-based models proposed by Bartle and Chrastil, and the calculated results showed good agreement with the tested data. The calculated data by Bartle model differed from the measured values by (6.76 to 9.60)%, and the average value of absolute relative deviations (AARD) with Chrastil model were observed to be between (7.42 to 12.27)%. Furthermore, solubility data were also utilized to estimate the partial molar volume for each compound in the supercritical phase using the theory developed by Kumar and Johnston.
Compounds
# Formula Name
1 C10H20N2O2 N,N'-dibutyloxalamide
2 C14H28N2O2 N1,N2-dihexyloxalamide
3 C18H36N2O2 N1,N2-dioctyloxalamide
4 CO2 carbon dioxide
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
  • 4
  • 1
  • Solid-liquid equilibrium temperature, K ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 1
  • VISOBS
  • 25
  • POMD
  • 4
  • 1
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Gravimetric method
  • 25
  • POMD
  • 4
  • 2
  • Solid-liquid equilibrium temperature, K ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 2; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 2
  • VISOBS
  • 25
  • POMD
  • 4
  • 2
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 2; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Gravimetric method
  • 25
  • POMD
  • 4
  • 3
  • Solid-liquid equilibrium temperature, K ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 3; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • VISOBS
  • 25
  • POMD
  • 4
  • 3
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 3; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Gravimetric method
  • 25