Study on the dehydration of organic solvents by pervaporation and the mass transfer mechanism of pervaporation

The dehydration of organic solvents by pervaporation using a PVA/PAN (pdy vinyl alcohol/ polyacrylonitrile) composite membrane is introduced. A theoretical non-equilibrium-solution diffusion model is proposed. Methods are studied to determine solution rate coefficients and diffusion coefficients. Pervaporation separation of an ethanol-water mixture is simulated on the basis of the new mass transfer model.