SRK方程α的改进及其在汽-液相平衡预测中的应用

• Published in: 中国化学工程学报（英文版） Vol. 15; no. 1; pp. 102 - 109
• Main Authors: 罗明检, 马沛生, 夏淑倩
• Format: Journal Article
• Language: Chinese
• Published: Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China%Key Laboratory for Green Chemical Technology School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China 2007; School of Chemistry and Chemical Engineering, Daqing Petroleum Institute, Daqing 163318, China
• Subjects: saturated pressure; prediction; vapor liquid equilibrium; SRK equation of state
• ISSN: 1004-9541

O6; 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.