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Vapor-Phase Solubility of Decane in Nitrogen as Functions of Temperature and Pressure

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This Demonstration computes the solubility of a high-temperature boiling fluid (-decane) in supercritical nitrogen at various high pressures for user-set values of the temperature. Two approximate methods for solubility prediction are compared: (1) the ideal gas assumption (blue curve); and (2) real gas behavior, described by the virial equation of state (red curve). Here, the fugacity coefficients are computed using the virial equation.

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The first snapshot corresponds to a temperature of 50 °C and shows excellent agreement with Figure 5-41 in [1]. The value of the virial coefficient at 50 °C given in [1], determined by fitting the model to experimental solubility data, compares favorably with obtained in the present calculation at the same temperature.

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Contributed by: Housam Binous, Brian G. Higgins, Nadhir A. Al-Baghli, and Ahmed Bellagi (January 2013)
Open content licensed under CC BY-NC-SA

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Reference

[1] J. M. Prausnitz, R. N. Lichtenthaler, and E. Gomes de Azevedo, Molecular Thermodynamics of Fluid-Phase Equilibria, 3rd ed., Upper Saddle River, NJ: Prentice Hall, 1999.

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