Exceptional high selectivity of hydrogen/methane separation on a phosphonate-based MOF membrane with exclusion of methane molecules

Abstract

A phosphonate-based metal–organic framework membrane was constructed on a porous anodic alumina membrane (PAAM) substrate for H₂/CH₄ separation for the first time. Owing to the ultra-micro pore windows, this membrane exhibited effective size exclusion for CH₄ molecules but suitable permeance for H₂ molecules, giving rise to an exceptional high H₂/CH₄ separation selectivity.