Permeability of gases through an asymmetric polyvinyl trimethyl silane membrane

Abstract

It was shown that gas flow through an asymmetric polyvinyl trimethyl silane membrane may be presented as flow consisting of three components—activated diffusion, Poiseuille viscosity flow and Knudsen capillary flow. By experimental measurement of the dependence of flow on pressure for nitrogen and argon the effect of each component on overall flow was calculated. Using the equations derived hydrogen and helium flow values were calculated from results for nitrogen and argon; deviation of calculated flow values from experimental results was less than ∼ 2%.