Effect of Thickness on Permeability
When the observed permeability changes as a function of membrane thickness, there are two reasons. One is the presence of boundary layers or interfacial resistances. The other is variation of permeability throughout the membrane, as in the case of laminated film composites of different permeability layers. Examples of both cases are presented and analyzed to elucidate internal and external phenomena of the membrane processes. This type of thickness analysis is completely general and can be applied to any membrane process.
KeywordsMembrane Thickness Critical Thickness Boundary Resistance Intrinsic Permeability Permeation Flux
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