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

Determination of Dichlorodifluoromethane's Diffusion Coefficients in Hydrogen, Helium, Nitrogen, and Air by Reversed-Flow Inverse Gas Chromatography

Martakidis, K.[Kosmas], Gavril, D.[Dimitrios]
J. Chem. Eng. Data 2019, 64, 6, 2429-2435
ABSTRACT
Diffusion coefficients of dichlorodifluoromethane in hydrogen, helium, nitrogen and air were determined by means of reversed-flow inverse gas chromatography, at atmospheric pressure and temperatures in the region of 312.6 K to 350.8 K. The uncertainty of the present values lies at their third decimal point. Comparing them with the respective values predicted by various empirical equations, it is concluded that relations utilizing diffusion volumes, such as Fuller-Schettler-Giddings, Gilliland and Huang, resulted in better agreement: 1.8-2.7 % in H2, 0.3-0.8 % in He, 2.5-3.3 % in N2 and 0.9-1.8 % in air. The temperature exponents for CCl2F2's diffusion were: 1.55, 1.58, 1.76 and 1.77, in H2, He, N2 and air, respectively, ranging between the values predicted by simple kinetic theory and semi-empirical equations.
Compounds
# Formula Name
1 CCl2F2 dichlorodifluoromethane
2 O2 oxygen
3 He helium
4 H2 hydrogen
5 N2 nitrogen
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
  • 4
  • Binary diffusion coefficient, m2/s ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mole fraction - 1; Gas
  • Gas
  • reversed-flow inverse gas chromatography
  • 9
  • POMD
  • 1
  • 3
  • Binary diffusion coefficient, m2/s ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mole fraction - 1; Gas
  • Gas
  • reversed-flow inverse gas chromatography
  • 9
  • POMD
  • 1
  • 5
  • Binary diffusion coefficient, m2/s ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mole fraction - 1; Gas
  • Gas
  • reversed-flow inverse gas chromatography
  • 9
  • POMD
  • 1
  • 5
  • 2
  • Binary diffusion coefficient, m2/s ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Mole fraction - 1; Gas
  • Mole fraction - 5; Gas
  • Gas
  • reversed-flow inverse gas chromatography
  • 9