An extension of the group contribution method for estimating thermodynamic and transport properties part II. Polyatomic gases (F2, Cl2, CS2, H2S, NO and N2O) |
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Authors: | Seung-Kyo Oh Ki-Hark Park |
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Affiliation: | (1) Department of Chemical and Biochemical Engineering, Kon-Yang University, San 26, Naedong, Nonsan, 320-711 Chungnam, Korea;(2) College of Natural Science, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, 151-742 Soeul, Korea |
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Abstract: | Earlier work on the group contribution method applied to the Kihara potential is extended to polyatomic gases for the calculation
of second virial coefficients, viscosities and diffusivities of dilute gases with a single set of gas group parameters. Functional
group parameters are evaluated from the simultaneous regression of second virial coefficient and viscosity data of pure gases.
Parameters for gas groups (F2, Cl2, CS2, H2S, NO, nd N2O) are found to provide good predictions of second virial cross coefficients, mixture viscosities and binary diffusion coefficients
of gas-gas mixtures. Application of the model shows that second virial coefficient data can be represented with good results
comparable to the values by means of the corresponding states model. The reliability of the present model in viscosity predictions
is proved by comparison with the Lucas method. Predictions of binary diffusion coefficients are in excellent agreement with
experimental data and compare well with values obtained by means of the Fuller method. |
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Keywords: | Theory Group Contribution Kihara Potential Second Virial Coefficient Viscosity Diffusivity |
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