Prediction of the thermodynamic properties and the phase behavior of binary mixtures in the extended critical region

A new parametric crossover equation of state for pure fluids and binary mixtures, which incorporates the scaling laws asymptotically close to the critical point and is transformed into the regular classical expansion far away from the critical point, is proposed. A comparison is made with the experi...

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Bibliographic Details
Published in:Fluid phase equilibria 1997, Vol.128 (1), p.1-28
Main Author: Kiselev, S.B
Format: Article
Language:English
Subjects:
Binary mixtures
Chemical thermodynamics
Chemistry
Critical phenomena
Crossover equation of state
Dilute aqueous solutions
Ethane
Exact sciences and technology
General and physical chemistry
General. Theory
Methane
n-Butane
Phase behavior
Sodium chloride
Thermodynamic properties
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Summary:A new parametric crossover equation of state for pure fluids and binary mixtures, which incorporates the scaling laws asymptotically close to the critical point and is transformed into the regular classical expansion far away from the critical point, is proposed. A comparison is made with the experimental data for pure methane, ethane and n-butane, and for binary mixtures of methane and ethane, and of ethane and n-butane. The equation of state yields a satisfactory representation of the thermodynamic property data in a large range of temperatures and densities. An application for dilute aqueous sodium chloride solutions is also discussed.
ISSN:0378-3812
1879-0224
DOI:10.1016/S0378-3812(96)03173-1