Thermodynamic Insights into the Characteristics of Unary and Mixture Permeances in Microporous Membranes.

Abstract in brief

• This article explores how the permeances of gases in microporous membranes depend on factors like pressure, temperature, and feed composition, with a focus on comparing single-gas and mixture permeances using adsorption potential as a key parameter.
• It argues that adsorption potential, which can be calculated from ideal adsorbed solution theory, helps rationalize experimental data and provides a unified way to understand how different conditions affect membrane performance.
• For certain membrane types like SAPO34, DDR, and ZIF8, permeance values are primarily determined by the adsorption potential, regardless of the gas mixture, while in MFI membranes, the mobility of gases is influenced by molecular correlations within the channels, especially when smaller molecules slow down larger ones.]