Water Stability and Competition Effects Toward CO2Adsorption on Metal Organic Frameworks

Metal-organic frameworks (MOFs) are compounds consisting of metal cations and organic anions organized in porous three-dimensional structures. MOFs exhibit higher selective adsorption performance for CO2-containing gas mixtures than traditional porous materials, making them promising candidates in CO2 capture. However, it is important to understand H2O effects on CO2 adsorption in MOFs before making them more applicable in the process designed to separate CO2 from wet gas mixtures. In this review, we summarize the current state of MOF development for CO2 adsorption. The stability of MOFs toward water and the strategies of enhancing the water stability for MOFs were discussed. The different effects of water on the CO2 adsorption and separation performance and the mechanism of the effects were analyzed.