PREDICTION OF VAPOR-LIQUID EQUILIBRIA BY USIMG EQUATIONS OF STATE WITH ZERO-PRESSURE EXCESS GIBBS ENERGY MIXING RULES. THE RKU2 MODEL FOR MODERATE TEMPERATURES
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概要
- 論文の詳細を見る
A zero-pressure mixing rule for the energy parameter in cubic equations of state has been developed. The composition dependence of the mixture volume u = v/b at zero pressure is approximated by a two-parameter Redlich-Kister expansion (RKU2). The RKU2 coefficients are determined from pure component parameters of a cubic equation of state and activity coefficients at infinite dilutions.The RKU2 mixing rule combined with the SRK equation of state has been tested for seven isothermal and nine isobaric binary systems. At moderate temperatures the model performs comparably to the treatment requiring an additional iterative procedure (Heidemann and Kokal, 1990). Extensions to ternary systems and the importance of correct temperature dependence of the activity coefficient models used in the mixing rules are discussed.
- 社団法人 化学工学会の論文
- 1993-04-20
著者
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Kolar Petr
Department Of Industrial Chemistry College Of Science And Technology Nihon University
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Kojima Kazuo
Department Of Industrial Chemistry College Of Science And Technology Nihon University
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Kojima Kazuo
Department Of Applied Chemistry College Of Life Sciences Ritsumeikan University
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