Molecular‐Sieve Membrane with Hydrogen Permselectivity: ZIF‐22 in LTA Topology Prepared with 3‐Aminopropyltriethoxysilane as Covalent Linker

High hydrogen selectivity and thermal stability are displayed by a membrane of zeolitic imidazolate ZIF-22 grown on porous ceramic supports by using 3-aminopropyltriethoxysilane (APTES) as covalent linker (see picture). At 323 K, H2/CO2 selectivity of 7.2 and H2 permeance of 1.6×10−7 mol m−2 s−1 Pa−1 were achieved.