CO2 capture under humid conditions in metal–organic frameworks

Abstract

Metal–organic frameworks (MOFs) are one of the most promising candidates for CO₂ capture due to their sorption selectivity towards CO₂. The optimisation of the physical–chemical interactions between MOFs and CO₂ molecules is the key to further amplification of CO₂ capture. An emerging technology for CO₂ capture is the construction of hybrid adsorbent MOFs via confinement of water inside the pores. This review article describes the recent progress in this field. Indeed, the pre-adsorption of small quantities of water within the micropores of MOF materials (constructed with hydroxo functional groups, μ₂-OH) provides a positive impact on the overall CO₂ capture. We anticipate that the current review article can offer useful information on the significant developments made for the enhancement of CO₂ capture by confining water (and other solvents) within the pores of MOFs, which is a very promising technology for real-world applications, where MOF materials could be capable of serving as next-generation CO₂ capture systems.