Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Critical parameters for propane determined by the image analysis

Honda, Y., Sato, T., Uematsu, M.
J. Chem. Thermodyn. 2008, 40, 2, 208-211
ABSTRACT
The (p,q,T) measurements and visual observations of the meniscus for propane were carried out carefully in the critical region over the range of temperatures: 60 mK 6 (T Tc) 6 40 mK and of densities: 4 kg Ae m 3 6 (q qc) 6 6 kg Ae m 3 by a metal-bellows volumometer with an optical cell. Vapour pressures were also measured at T = (320.000, 343.132, 369.000, and 369.625) K. The critical point of Tc, qc, and pc was determined by the image analysis of the critical opalescence. Comparisons of the critical parameters with values given in the literature are presented.
Compounds
# Formula Name
1 C3H8 propane
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
  • Critical pressure, kPa ; Liquid
  • Liquid
  • Gas
  • Direct measurement
  • 1
  • POMD
  • 1
  • Critical temperature, K ; Liquid
  • Liquid
  • Gas
  • VISOBSU:UFactor:0.5
  • 1
  • POMD
  • 1
  • Critical density, kg/m3 ; Liquid
  • Liquid
  • Gas
  • image analysis
  • 1
  • POMD
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 4