Prediction of the relative permeability of gases in mixed matrix membranes

In the present work, the existing theoretical models for the estimation of gas permeation through mixed matrix membranes (MMMs) were tested using the available literature data and the results are discussed in detail. Based on the analysis, the variables affecting the relative permeability of gases have been identified. By incorporating the rigidified interfacial layer between the molecular sieve phase and the polymer phase, a new methodology was developed by using Pal model as a base. The present proposed methodology, showed an accurate prediction of the permeability of gases through different MMMs. The present methodology for the estimation of permeability was validated using the available literature data, and a satisfactory agreement was found.

Schematic representation of three phases mixed matrix membrane system.Figure optionsDownload high-quality image (76 K)Download as PowerPoint slideHighlights
► A new approach using Pal model as the base was developed for three phase MMM system.
► The effect of interfacial rigidified matrix chain layer was incorporated.
► The well known gas permeation models in MMMs were compared and summarized.
► The present methodology showed a reasonable prediction of the permeability of gases.