MOF-74 type variants for CO2 capture

Abstract

Carbon capture and storage (CCS) is aimed at disposing the carbon dioxide (CO₂) generated by power plants. As next-generation adsorbents, metal–organic framework (MOF) adsorbents with high surface area, tunable pore size, and low heat capacity are in the spotlight for CCS applications. Among the known MOFs, MOF-74 type analogs exhibit high CO₂ adsorption performance due to the open metal sites in the hexagonal channels aligned along the c-axis. Extensive studies on such adsorbents have been carried out to control CO₂ adsorption and enable selective adsorption even under wet conditions. From this perspective, this review addresses not only the CO₂ adsorption properties of the MOF-74 type structures, but also their enhanced CO₂ capacity through modifications of organic linkers and open metal sites of the frameworks.