SRK方程α的改进及其在汽-液相平衡预测中的应用

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SRK方程α的改进及其在汽-液相平衡预测中的应用

罗明检^a,b; 马沛生^b; 夏淑倩^b

^a School of Chemistry and Chemical Engineering, Daqing Petroleum Institute, Daqing 163318, China ^b Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology, Tianjin Uni-versity, Tianjin 300072, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-02-28 发布日期:2007-02-28
通讯作者: 罗明检

A modification of α in SRK equation of state and vapor-liquid equilibria prediction

LUO Mingjian^a,b; MA Peisheng^b; XIA Shuqian^b

^a School of Chemistry and Chemical Engineering, Daqing Petroleum Institute, Daqing 163318, China ^b Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology, Tianjin Uni-versity, Tianjin 300072, China

Received:1900-01-01 Revised:1900-01-01 Online:2007-02-28 Published:2007-02-28
Contact: LUO Mingjian

摘要/Abstract

摘要： Based on results of saturated vapor pressures of pure substances calculated by SRK equation of state, the factor α in attractive pressure term was modified. Vapor-liquid equilibria of mixtures were calculated by original and modified SRK equation of state combined with MHV1 mixing rule and UNIFAC model, respectively. For 1447 saturated pressure points of 37 substance including alkanes; organics containing chlorine, fluorine, and oxygen; inorganic gases and water, the original SRK equation of state predicted pressure with an average deviation of 2.521% and modified one 1.673%. Binary vapor-liquid equilibria of alcohols containing mixtures and water containing mixtures also indicated that the SRK equation of state with the modified α had a better precision than that with the original one.

关键词: SRK equation of state;vapor liquid equilibrium;saturated pressure;prediction

Abstract: Based on results of saturated vapor pressures of pure substances calculated by SRK equation of state, the factor α in attractive pressure term was modified. Vapor-liquid equilibria of mixtures were calculated by original and modified SRK equation of state combined with MHV1 mixing rule and UNIFAC model, respectively. For 1447 saturated pressure points of 37 substance including alkanes; organics containing chlorine, fluorine, and oxygen; inorganic gases and water, the original SRK equation of state predicted pressure with an average deviation of 2.521% and modified one 1.673%. Binary vapor-liquid equilibria of alcohols containing mixtures and water containing mixtures also indicated that the SRK equation of state with the modified α had a better precision than that with the original one.

Key words: SRK equation of state, vapor liquid equilibrium, saturated pressure, prediction

罗明检, 马沛生, 夏淑倩. SRK方程α的改进及其在汽-液相平衡预测中的应用[J]. , DOI: .

LUO ,Mingjian, MA ,Peisheng, XIA ,Shuqian. A modification of α in SRK equation of state and vapor-liquid equilibria prediction[J]. , DOI: .

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