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

Relative Permittivity Measurements of Gaseous, Liquid, and Supercritical Dimethyl Ether

Eltringham, W.[Wayne], Catchpole, O. J.[Owen J.]
J. Chem. Eng. Data 2007, 52, 2, 363-367
ABSTRACT
The relative permittivity ( r) of dimethyl ether (DME) was measured as a function of temperature and pressure in the gaseous, liquid, and supercritical states. The temperature and pressure ranges studied were (303 to 403) K and (0.04 to 33.2) MPa, respectively. The relative permittivity was fitted to the reduced density (Fr) using the function ( r - 1)/(2 r + 1), and the apparent dipole moment (i*) of the liquid phase was calculated using Kirkwood s theory of molecular polarizability.
Compounds
# Formula Name
1 C2H6O dimethyl ether
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
  • Relative permittivity at zero frequency ; Gas
  • Temperature, K; Gas
  • Pressure, kPa; Gas
  • Gas
  • Parallel plate capacitor
  • 70
  • POMD
  • 1
  • Relative permittivity at zero frequency ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Parallel plate capacitor
  • 13
  • POMD
  • 1
  • Relative permittivity at zero frequency ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Parallel plate capacitor
  • 145