IBMEM Industrial Biotech Membranes
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Distillation / Pervaporation, analogies et différences The separation principle governing pervaporation is a combination of selective sorption/solution and diffusion. The fractionation process is mainly due to polarity differences, and not to the volatility difference of the components in the feed. It differs significantly from distillation, which depends on differences in vapour liquid equilibrium relationships. Pervaporation can be considered in situations where distillation is impossible, difficult or uneconomic - mainly for systems that demonstrate azeotropic behaviour. Filtration / Pervaporation, analogies et différences
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Pervaporation modes Pervaporation and vapour permeation are similar membrane-based separation processes whose basic difference lies in the physical state of the feed stream: The Feed is a liquid for the pervaporation and a vapour for the vapour permeation.
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