SCI和EI收录∣中国化工学会会刊

›› 2009, Vol. 17 ›› Issue (2): 259-267.

• THERMODYNAMICS AND CHEMICAL ENGINEERING DATA • Previous Articles     Next Articles

Activity Coefficient Models to Describe Vapor-Liquid Equilibrium in Ternary Hydro-Alcoholic Solutions

Claudio A. Faúndez1, JosóO. Valderrama2,3   

  1. 1. Universidad de Concepción, Fac.de Cs.Físicas y Matemáticas, Casilla 160-C, Concepción, Chile;
    2. Universidad de La Serena, Fac.de Ingeniería, Casilla 554, La Serena, Chile;
    3. Centro de Información Tecnológica (CIT), Casilla 724, La Serena, Chile
  • Received:2008-08-26 Revised:2009-01-04 Online:2009-04-28 Published:2009-04-28
  • Supported by:
    Supported by the Direction of Research of the University of La Serena-Chile (220-2-05 and 220-2-21);the National Council for Scientific and Technological Research,CONICYT (FONDECYT 3020020)

Activity Coefficient Models to Describe Vapor-Liquid Equilibrium in Ternary Hydro-Alcoholic Solutions

Claudio A. Faúndez1, José O. Valderrama2,3   

  1. 1. Universidad de Concepción, Fac.de Cs.Físicas y Matemáticas, Casilla 160-C, Concepción, Chile;
    2. Universidad de La Serena, Fac.de Ingeniería, Casilla 554, La Serena, Chile;
    3. Centro de Información Tecnológica (CIT), Casilla 724, La Serena, Chile
  • 通讯作者: José O. Valderrama,E-mail:jvalderr@userena.cl
  • 基金资助:
    Supported by the Direction of Research of the University of La Serena-Chile (220-2-05 and 220-2-21);the National Council for Scientific and Technological Research,CONICYT (FONDECYT 3020020)

Abstract: In this study,three semipredictive activity coefficient models:Wilson,non-random-two liquid model(NRTL),and universal quasi-chemical model(UNIQUAC),have been used for modeling vapor-liquid equilibrium properties of ternary mixtures that include substances found in alcoholic distillation processes of wine and musts.In particular,vapor-liquid equilibrium in ternary mixtures containing water+ethanol+congener has been modeled using parameters obtained from binary and ternary mixture data.The congeners are substances that although present in very low concentrations,of the order of part per million,are important enological parameters.The results given by these different models have been compared with literature data and conclusions about the accuracy of the models studied are drawn,recommending the best models for correlating and predicting phase equilibrium properties of this type of mixtures.

Key words: wine distillation, activity coefficient models, vapor-liquid equilibrium

摘要: In this study,three semipredictive activity coefficient models:Wilson,non-random-two liquid model(NRTL),and universal quasi-chemical model(UNIQUAC),have been used for modeling vapor-liquid equilibrium properties of ternary mixtures that include substances found in alcoholic distillation processes of wine and musts.In particular,vapor-liquid equilibrium in ternary mixtures containing water+ethanol+congener has been modeled using parameters obtained from binary and ternary mixture data.The congeners are substances that although present in very low concentrations,of the order of part per million,are important enological parameters.The results given by these different models have been compared with literature data and conclusions about the accuracy of the models studied are drawn,recommending the best models for correlating and predicting phase equilibrium properties of this type of mixtures.

关键词: wine distillation, activity coefficient models, vapor-liquid equilibrium