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Separation Process Engineering: Includes Mass Transfer Analysis, Third Edition by Phillip C. Wankat

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17.6 Pervaporation (PERVAP)

Pervaporation can be traced back to Graham’s work in the 1860s, but definite work was done by Binning in the 1950s and 1960s, with first commercialization for ethanol purification in the 1980s (Baker et al., 1990). Pervaporation is currently a rapidly expanding membrane separation technique because very high selectivities with reasonable fluxes are often obtained. In pervaporation a high-pressure liquid is fed to one side of the membrane, one component preferentially permeates the membrane, then evaporates on the downstream side, and a vapor product, the permeate, is withdrawn (Figure 17-13). The word “pervaporation” is a contraction of permeation and evaporation. The retentate, which does not permeate through the ...

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