| Abstract: | A model is discussed which explains reported complex effects of feed composition and pressure on component permeabilities in high-pressure gas separators based on glassy polymer membranes. A special form of Fick's law which accounts for the fact that penetrants in glassy polymers sorb into and diffuse through two different molecular environments provides the basis for the analysis of gas mixture permeation. Potential deviations from the theory are discussed in terms of separable solubility-and mobility-related effects. |
