Abstract
Operating parameters and conditions for pervaporation processes are discussed for which direct heating of the membranes is important due to the temperature decreases of the feed. We show that it is possible to operate a pervaporation process where the heat of evaporation for the permeate supplied by electric power input. This gives the opportunity to operate crossflow pervaporation processes irrespective of any temperature decrease in the module, even at low crossflow velocities. Furthermore we investigated the possibility of this technique to compensate for the temperature decrease due to the Joule-Thomson effect seen in gas separation processes. In gas permeation experiments it is shown to be possible to prevent freezing of the permeating gas by the use of direct electric heating.
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