MOF based membranes in gas separation area

Abstract

Microporous metal organic framework materials are a series of noticeable membrane materials for the separation of gas molecules and liquid molecules. MOFs can be functionalized through tuning pore size through the variation of ligand length, metal nodes and more, or through adjusting adsorption site such as functional sites, linker functional sites, and open metal sites. Membranes can provide higher structure stability for MOFs, however, addressing synthetic, processing, and design challenges is crucial to produce MOF films with excellent mechanical integrity, chemical stability, and high performance under relevant industrial conditions，such as interfacial compatibility issues towards Mixed-Matrix-Membranes (MMMs) and Pure-MOF film issues regarding chemical and thermal robustness, morphology, and orientation. The alkyne/alkene separation, alkane/alkene separation and more gas mixture has been proven can be achieved through the use of MOF-based membranes, moreover, compared to traditional methods, MOF-based membranes possess better performance on separating forementioned gas mixtures with higher selectivity, purity and less harm to the environment.