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Received May 7, 2004
Accepted September 13, 2004
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A Molecular Model for Correlating Vapor-Liquid Equilibrium of Propane+Hydrocarbon Mixtures
Dept. of Physics, University of La Serena, Casilla 554, La Serena, Chile 1Dept. of Mechanical Engineering, University of La Serena, Casilla 554, La Serena, Chile
cfaundez@userena.cl
Korean Journal of Chemical Engineering, November 2004, 21(6), 1199-1204(6), 10.1007/BF02719494
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Abstract
Simple analytical expressions are proposed for the calculation of the equilibrium pressure and the mole fractions of both liquid and vapor phases of propane+hydrocarbon binary mixtures. The new proposed expressions are based on a simple analytical expression for the vapor pressure of pure non-polar fluids, which, for a given temperature, only requires as input the values of the Lennard-Jones molecular parameters and the acentric factor. A properly modified Lorentz-Berthelot mixing rule is used, the interaction parameters being given as simple functions of the temperature and concentration with eight constants for each binary mixture. A different model is proposed to calculate the vapor mole fraction in which four appropriate constants are needed for each mixture. Here, it is shown how the models can reproduce accurately and straightforwardly the vapor liquid equilibrium properties (pressure, liquid mole fraction, and vapor mole fraction) of binary mixtures containing propane.
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Fermeglia M, Pricl S, AIChE J., 47(10), 2371 (2001)
Gao G, Dadiron JL, Saint-Guirons H, Xans P, Montel F, Fluid Phase Equilib., 74, 85 (1992)
Glanville JW, Sage BH, Lacey WN, (1950). In: "Vapor-Liquid Equilibrium Data Collection," H. Knapp, R. Doring, L. Oellirch, U. Plocker and J. M. Prausnitz (eds.), DECHEMA, Frankfurt am Main (1982)
Graboski MS, Daubert TE, Ind. Eng. Chem. Process Des. Dev., 17(4), 448 (1978)
Huron MJ, Vidal J, Fluid Phase Equilib., 3, 255 (1979)
Kay WB, (1948)In: "Vapor-Liquid Equilibrium Data Collection," H. Knapp, R. Doring, L. Oellirch, U. Plocker and J. M. Prausnitz (eds.), DECHEMA< Frankfurt am Main (1982)
Kay WB, (1970)In: "Vapor-Liquid Equilibrium Data Collection," H. Knapp, R. Doring, L. Oellirch, U. Plocker and J. M. Prausnitz (eds.), DECHEMA, Frankfurt am Main (1982)
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Kiselev SB, Rainwater JC, Huber ML, Fluid Phase Equilib., 150, 469 (1998)
Polishuk I, Wisniak J, Segura H, Fluid Phase Equilib., 164(1), 13 (1999)
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Sage BH, Lacey WN, (1940). In: "Vapor-Liquid Equilibrium Data Collection," H. Knapp, R. Doring, L. Oellirch, U. Plocker and J.M. Prausnitz (eds.), DECHEMA, Frankfurt am Main (1982)
Stryjek R, Vera JH, Can. J. Chem. Eng., 64, 820 (1986)
Valderrama JO, Ind. Eng. Chem. Res., 42(7), 1603 (2003)
Walas SM, "Phase Equilibria in Chemical Engineering," 1st ed., Chap. 6, pp. 302-309, Butterworth Pub., Storeham, USA (1985)
Wong DSH, Sandler S, AIChE J., 38, 671 (1992)
