Abstract
In this work, the characteristics and enhancement of pervaporation for the separation of alcohol—water mixtures, especially for the ethanol—water azeotrope, have been demonstrated along with the investigation of the modified solution—diffusion model and the experimental results with several kinds of membranes such as cellulose triacetate, polysulfone, polyvinyl acetate/polysulfone, polyacrylamide-polyacrylonitrile/cellulose acetate, etc. In addition to the determination of separation factor and permeability, the effective direct determination of solubility of solute (or solvent) inside the membrane has been carried out by the novel device aided by GC-103. Meanwhile, the diffusivity, with which the multicoefficient diffusion model is correlated, has been determined by a transient approach and pervaporation, respectively. Furthermore, the effect of changing the operating temperature has been shown. The results conform with the theoretical prediction and provide the scientific basis for further developing this process in industrial application.
Published Version
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