The separation of toluene-ethanol mixtures was studied using a polyethylene membrane in a small pervaporation cell. With

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The separation of toluene-ethanol mixtures was studied using a polyethylene membrane in a small pervaporation cell. With one atmosphere pressure and 30°C on the 361 upstream side and full vacuum on the permeate side, the pure-component permeation rates were 3.89 x 10-4 kg/m2·s for toluene and 0.273 x 10-4 kg/m2·s for ethanol. With 50 volume percent toluene in the liquid, the fluxes were 2.5 x 10-4 kg/m2·s for toluene and 0.5 x 10-5 kg/m2·s for ethanol. Calculate the selectivity based on the mole fraction of toluene in the permeate and the solution. Compare this with the selectivity predicted from the pure-component data, neglecting interactions between the components.

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Unit Operations Of Chemical Engineering

ISBN: 9780072848236

7th Edition

Authors: Warren McCabe, Julian Smith, Peter Harriott

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