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Intégration de la pervaporation dans un procédé d'estérification en vue de la réduction des coûts énergétiques

Abstract : Ethyl acrylate is synthesized by the catalytic esterification of acrylic acid and ethanol. The reaction can be described as: CH2=CH-COOH + C2H5OH D CH2=CH-COOC2H5 + H2O Since this reaction is reversible, the removal of the water helps shifting the reaction to the right side, thus increasing the conversion of acrylic acid to ethyl acrylate. Pervaporation is a membrane separation technique which is helpful for the dehydration of organic mixtures. In this work, we studied the industrial process for the esterification of ethyl acrylate which is continuous. To our knowledge this is the first time that the pervaporation of a mixture containing polymerizable acrylic derivatives is studied. Firstly, the continuous esterification process was simulated on Aspen Plus. An analysis of the flowsheet diagram has identified two scenarios for improving energy performance through implementing dehydration pervaporation. In the most favorable scenario, the pervaporation can reduce 25% energy consumption or increase 25% ethyl acrylate production. In the second part of our study, commercial membranes were tested for dehydrating mixtures which are representative of esterification reaction. The tested membranes offered good separation performance (high flux and selectivity) and high chemical resistance. The feasibility of the hybrid process is thus proven
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Hoang Thien Truong. Intégration de la pervaporation dans un procédé d'estérification en vue de la réduction des coûts énergétiques. Alimentation et Nutrition. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0300⟩. ⟨tel-01749472⟩



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