A molecular model for correlating vapor-liquid equilibrium of propane+hydrocarbon mixtures |
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Authors: | Email author" target="_blank">Claudio?A?FaúndezEmail author Luis?E?Tamblay José?O?Valderrama |
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Affiliation: | (1) Dept. of Physics, University of La Serena, 554 Casilla, La Serena, Chile;(2) Dept. of Mechanical Engineering, University of La Serena, 554 Casilla, La Serena, Chile |
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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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Keywords: | Vapor-liquid Equilibrium Molecular Models Propane-mixtures Mixing Rules |
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