Determination of binary mixture vapor-liquid critical densities from coexisting density data
Two-phase vapor-liquid equilibrium (VLE) isochores for binary mixtures are defined as the thermodynamic paths along which the overall density and composition are fixed. Data along such isochores are generated from a modified Leung-Griffiths model fit to experimental data for the binary system nitrogen-methane. The behavior of the liquid volume fraction along these isochores is found to be similar to that for pure fluids. Rectilinear diameters for varying overall densities (fixed composition) are seen to be nearly coincident. Straight-line diameters and the critical liquid volume fraction method are utilized to predict critical densities using data near and removed from the critical point. Both methods give acceptable results but the critical liquid volume fraction method is more accurate. A critical literature review of the need for binary mixture critical densities is presented and a proposed experimental procedure is given for the determination of mixture critical densities.
- Research Organization:
- Calvin College, Grand Rapids, MI
- OSTI ID:
- 5692713
- Journal Information:
- Int. J. Thermophys.; (United States), Vol. 8:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BINARY MIXTURES
DENSITY
METHANE
NITROGEN
CRITICAL PRESSURE
CRITICAL TEMPERATURE
EQUILIBRIUM
LIQUIDS
MATHEMATICAL MODELS
MEASURING METHODS
THERMODYNAMICS
VAPORS
VOLATILITY
VOLUME
ALKANES
DISPERSIONS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
090110* - Hydrocarbon Fuels- Properties- (1979-1989)