Contribution à la modélisation thermodynamique d'un atelier de purification d'acide acrylique

Abstract : This work focuses on the contribution in the thermodynamic modeling of an acrylic acid purification unit. After identifying the main products involved in the purification step and collecting their thermodynamic properties available in the literature, we conducted a series of experimental measurements for a range of mixtures containing carboxylic acids(mainly liquid-liquid equilibrium and vapor-liquid equilibrium diagrams, excess enthalpies and excess volumes).The data set-our measurements and literature values-was used according to two approaches for modeling vapor-liquid equilibrium: a symmetric approach(phi-phi) applied to the equations of state Peng-Robinson (P-R) and PC-SAFT and an asymmetrical approach (gamma-phi) applied to the models of activity coefficients in the liquid phase NRTL, UNIQUAC and Van Laar associated with various equations of state in the vapor phase(ideal gas, Viriel, Hayden O'Connell and Nothnagel). We have finally chosen the UNIQUAC thermodynamic model associated with the correlation of Hayden O'Connell in vapor phase. New binary parameters were determined and led to consistent and satisfactory results in comparison with our experimental measurements and literature data. These parameters can also be used to adequately describe the diagrams of vapor-liquid equilibrium and the relative volatilities of the mixtures studied
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Afef Attia Ben Amor. Contribution à la modélisation thermodynamique d'un atelier de purification d'acide acrylique. Alimentation et Nutrition. Université de Lorraine, 2013. Français. ⟨NNT : 2013LORR0254⟩. ⟨tel-01750719⟩

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