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

Accurate PVT Data for Methane from (300 to 450) K up to 180 MPa

Cristancho, D. E.[Diego E.], Mantilla, I. D.[Ivan D.], Ejaz, S.[Saquib], Hall, K. R.[Kenneth R.]
J. Chem. Eng. Data 2010, 55, 2, 826-829
ABSTRACT
This paper reports PVT data measured with a high-pressure, single-sinker, magnetic-suspension densimeter (MSD) from (300 to 450) K up to 180 MPa. Our MSD technique yields accurate data, with less than 0.05 % relative uncertainty, over the pressure range of (10 to 200) MPa. The experimental data compare well to the Setzmann and Wagner equation of state as implemented in RefProp 8.0. These methane density data are consistent with the low range of pressure predicted by RefProp 8.0 that has a relative uncertainty of 0.03 % up to 12 MPa and 0.07 % up to 50 MPa. The density predictions of this model agree well with previous data at higher pressures. The equation predicts data with almost the same uncertainty as the experimental data up to 180 MPa. These PVT data also allow reliable determination of both second and third virial coefficients.
Compounds
# Formula Name
1 CH4 methane
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
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Buoyancy - hydrostatic balance with magnetic suspension - one sinker
  • 83