MODEL FOR PERVAPORATION - APPLICATION TO ETHANOLIC SOLUTIONS OF AROMA

Pervaporation data of ethanolic solutions of linalool, in various oper ating conditions, are presented to test the efficiency of the transfer model based on the Thermodynamics of Irreversible Processes (TIP). Th is approach leads to the calculation of the observed permeation flux b y means of phenomenological coefficients which reflect coupling effect s between each permeant and the membrane material, as well as the coup ling effects between the permeants themselves. Experimental results al low to estimate groups of phenomenological coefficients and the influe nce of the operating conditions on them. This first presentation prove s a good fitting of the theoretical description on the experimental re sults and, particularly, the efficiency of this approach to account ea sily for pervaporation of several permeants.