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.
Arai T, Nishiumi H, "Correlation of the Binary Interaction Parameter of the Peng-Rovinson Equation of State," Bulletin of the College of Engineering, Hosei University, 20, 1, 1987
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
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
Kay WB, (1971)In: "Vapor-Liquid Equilibrium Data Collection," H. Knapp, R. Doring, L. Oellirch, U. Plocker and J. M. Prausnitz (eds.), DECHEMA, Frankfurt am Main, 1982
Reid RC, Prausnitz JM, Poiling BE, "The Properties of Gases and Liquids," 4th ed., Chap. 2, pp. 23; Chap. 8, pp. 272, Mc Graw Hill Book Co., New York, 1987
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