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Liquid-liquid equilibrium of aqueous polymer two-phase systems using the modifi...
Madeira, Pedro; Xin Xu; You-Ting Wu; Teixeira, J. A.; Macedo, EugéniaThe modified Wilson equation, developed in a previous publication, for the excess Gibbs energy of aqueous polymer solutions, is extended to multicomponent mixtures. The model provides a flexible framework to correlate and predict phase equilibria of aqueous polymer two-phase systems. The results obtained with the model are in fair agreement with the experimental data.
Activity coefficient and solubility of amino acids in water by the modified Wil...
Xin, Xu; Pinho, Simão; Macedo, Eugénia A.The modified Wilson model for the phase behavior of polymer aqueous solutions has been applied to calculate activity coefficients and the solubility of amino acids and small peptides in aqueous solutions. The interaction parameters estimated from the activity coefficients and the solubility data are used to evaluate the solubility of amino acids. The model can accurately represent the activity coefficients of a...
A new modified Wilson equation for the calculation of vapor–liquid equilibrium ...
Xin Xu; Madeira, Pedro; Teixeira, J. A.; Macedo, EugéniaA local composition model based on the lattice theory and two-fluid theory, considering the excess heat capacity, which is a modified Wilson equation, is developed for the excess Gibbs energy of aqueous polymer solutions. The model represents a synergistic combination of the excess entropy for mixing molecules of different sizes and the temperature dependent residual contribution, which combines the attractive ...
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