Mesoporous Glass Membranes as Model Systems to Study Gas Diffusion through Porous Media

Porous glass monoliths are suitable model systems to study pore size‐related effects in gas diffusion. Here, mesoporous glass membranes with different surface properties and pore diameters covering the lower mesopore range were synthesized and used to study gas permeation of adsorbable and non‐adsorbable gases. Dynamic single gas permeation measurements were performed using a modified Wicke‐Kallenbach cell. Chemical surface modification of the inner surface of the membranes resulted in altered adsorption and diffusion properties. Due to their favorable properties, porous glass monoliths are suitable model systems to study pore size‐related effects in gas diffusion. Mesoporous glass membranes were synthesized and characterized by dynamic single‐gas permeation measurements. A chemical surface modification was used to alter the adsorption and mass transfer properties of the mesoporous membranes.