In this work

the characteristics and enhancement of pervaporation for the separation of alcohol-water mixtures especially for ethanol-water azeotrope

have been demonstrated with several kinds of membranes such as CTA

PSf

PVAc/PSf

PAA-PAN/CA

etc. along with the investigation of a modified solution-diffusion model. In addition to the determination of separation factor and permeability

the effective direct determination of solubility of solute (or solvent) inside the membrane was carried out by a novel device coupled with GC-103. Meanwhile

the diffusivity was determined by a transient approach and pervaporation separately. A multicoefficient diffusion model was correlated. The results conform with the theoretical prediction and would provide the scientific basis for further industrial application.