Experimental Measurement and Modeling of Diffusion Anomalies in a CMS Membrane

Abstract

The sorption isotherm, permeation time lag, and steady state permeability of a noble gas, argon, were measured on a CMS membrane at different temperatures and a range of permeation pressures. It is found that Ar permeation present strong diffusion anomalies (The deviation to the traditional Darken relation). The degree of the anomalies was found approximately same for the transient permeation time lag and the steady state permeability. Comparison studies with other permeation gases further reveals that the permeation behaviors are related to their molecular properties.