Dielectric constants and Clausius-Mossotti functions for simple liquid mixtures: systems containing nitrogen, argon, and light hydrocarbons

Journal Article · Sat Mar 01 00:00:00 EDT 1975 · AIChE J.; (United States)

DOI:https://doi.org/10.1002/aic.690210209· OSTI ID:6324210

Pan, W P; Mady, M H; Miller, R C

The University of Wyoming Dept. of Mineral Engineering determined the dielectric constants and the Clausius-Mossotti functions (CM) for pure components, binary mixtures, and ternary mixtures of nitrogen, methane, ethane, propane, and isobutane at pressures near saturation between 91/sup 0/ and 115/sup 0/K. The excess Calusius-Mossotti functions (CM/sup E/) were also calculated for the pure-fluid and mixture values. The results of the mixtures indicate that the CM/sup E/ function is generally <0.1% of the mixture CM value for saturated liquid mixtures composed of simple nonpolar species. For such mixtures, dielectric constant measurements can be substituted for density measurements, if the composition and pure-component CM values are known. Pure-component results for propane and isobutane indicate that their permanent dipole moments are sufficient to affect their liquid dielectric properties at low temperatures. This is confirmed by the larger CM/sup E/ values obtained for mixtures containing these species. For typical LNG mixtures, where concentrations of these components are not too large, the CM values of the mixtures can be accurately determined by a mole fraction average calculation using the infinite-dilution CM value for these components in methane rather than their pure-component CM values. Deviations as large as 3% were found a direct proportionality between the light-hydrocarbon-liquid CM values and the heating values.

• OSTI ID: 6324210
• Journal Information: AIChE J.; (United States), Journal Name: AIChE J.; (United States) Vol. 21; ISSN AICEA
• Country of Publication: United States
• Language: English

Related Subjects

090110* -- Hydrocarbon Fuels-- Properties-- (1979-1989)
10 SYNTHETIC FUELS
ALKANES
BINARY MIXTURES
BUTANE
DIELECTRIC PROPERTIES
DISPERSIONS
ELECTRICAL PROPERTIES
ELEMENTS
ENERGY SOURCES
ETHANE
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROCARBONS
LIQUEFIED GASES
LIQUEFIED NATURAL GAS
LOW TEMPERATURE
METHANE
MIXTURES
NATURAL GAS
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PROPANE