Facile manufacture of porous organic framework membranes for precombustion CO2 capture

The development of new membranes with high H-2 separation performance under industrially relevant conditions (high temperatures and pressures) is of primary importance. For instance, these membranes may facilitate the implementation of energy-efficient precombustion CO2 capture or reduce energy intensity in other industrial processes such as ammonia synthesis. We report a facile synthetic protocol based on interfacial polymerization for the fabrication of supported benzimidazole-linked polymer membranes that display an unprecedented H-2/CO2 selectivity (up to 40) at 423 K together with high-pressure resistance and long-term stability (> 800 hours in the presence of water vapor).