Application of metal-organic frameworks for CO2 capture

Abstract

The emission of carbon dioxide (CO₂) is gradually increasing, and CO₂ adsorption from post-combustion processes in thermal power plants could be a viable option. As a solid adsorbent for CO₂ capture, metal-organic frameworks (MOFs) have higher selectivity and capacity for flue gas. Compared with traditional adsorbents, calgary framework 20 (CALF-20) that belongs to a zinc-based MOFs, efficiently captures CO₂ from flue gas and is affordable and durable also, which lays the foundation for its large-scale production. This article will introduce the overall idea of CO₂ adsorption, the structure of CALF-20, selectivity for N₂ and H₂O, competitive adsorption with H₂O-CO₂ and durability, and verify the excellent performance of CALF-20 with experimental results. In addition, the possibility of mass production was also shown. Specifically, CALF-20 is not as difficult to large scaling produce as other MOFs. In fact, its large-scale industrial production is feasible with its advantages of low cost, high yield, stability, environmentally friendly and safety.