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Abstract
Un modele simplifie de solution-diffusion, dit modele du volume fractionnaire total de solvant (modele TSVF), a ete recemment developpe en pervaporation pour decrire le phenomene de transfert de permeat a travers des membranes fortement selectives. Dans ce modele, le coefficient de diffusion de chaque espece dans la membrane depend de toute la fraction de volume occupee par le solvant dans le polymere et non du gonflement partiel de chaque solvant. Dans cet article, nous appliquons ce modele a la prediction des flux de pervaporation d'umelange « eau-ethanol » a 60°C et a pression aval variable a travers une membrane constituee d'un melange de PVA(90)-PAA(10).
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