SRK方程α的分析和比较

O6; AIpha functions of Soave.Redlich-Kwong(SRK)equation of state proposed by Soave,Twu,and Luo were difierent in mathematic tendency.They were compared in modeling methane-alkanes equilibria with Van der waals mixing rule and Modified Huron-Vidal(MHV1)mixing rule.respectively.Results showed that LUO...

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Published in中国化学工程学报（英文版） Vol. 16; no. 5; pp. 766 - 771
Main Authors 罗明检, 胡冰, 姜涛, 夏淑倩, 马沛生
Format Journal Article
LanguageChinese
Published School of Chemistry and Chemical Engineering,Daqing Petroleum Institute,Daqing 163318,China%Key Laboratory for Green Chemicai Technology,School of Chemical Engineering and Technology,Tianjin Uni-versity,Tianjin 300072,ChinaKey Laboratory for Green Chemicai Technology,Tianjin University,Tianjin 300072,China 2008
Subjects
equation of state
phase equilibria
virial coefficient
intermolecular force
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ISSN1004-9541

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Summary:O6; AIpha functions of Soave.Redlich-Kwong(SRK)equation of state proposed by Soave,Twu,and Luo were difierent in mathematic tendency.They were compared in modeling methane-alkanes equilibria with Van der waals mixing rule and Modified Huron-Vidal(MHV1)mixing rule.respectively.Results showed that LUO'S alpha function was a little more accurate than Soave'S.and Twu'S alpha funotion lacked accuracy in modeling meth-ane-alkanes equilibrium.SRK equation of state was expanded as virial form,and then the equivalent terms were contrasted with terms of virial equation of state.Results showed that Soave's and LUO's alpha functions matched the tendency of virial coefficient better than TwU's.and LUO's alpha function matched better than Soave'S in wide tem-perature range,which sustained the conclusions of phase equilibria calculation.LUO'S alpha function keeps de-creasing when Tr>l and becomes negative at Sufficient high temperature,thus the conventional cubic equation of state expressed pressure as the sum of repulsion
ISSN:1004-9541