Asymmetry of Gas Transfer through a Composite Membrane

摘要

Gas transfer through a composite has been studied. The main parameters affecting the membrane permeability have been determined. It has been shown that, in the presence of a viscous flow of a gas through a porous support, its flow rate through the composite membrane depends on the direction of transfer. The intensity of this effect increases with an increase in the support resistance to the Knudsen flow and decreases with reduction in the support resistance to the viscous flow or a decrease in the pressure drop across the membrane. It has been found that, in the presence of the asymmetry effect, the gas flow rate through the composite membrane is lower when the gas is transferred from a selective layer to a support.