Advances in Amine-Functionalized Metal Organic Frameworks for Carbon Capture

Abstract

Human activities since the Industrial Revolution have increased atmospheric carbon dioxide (CO2) levels and contributed to significant global warming. In response, carbon capture, utilization, and storage (CCUS) technologies, including industrial capture and direct air capture (DAC), are being developed to mitigate climate change while promoting energy efficiency and environmental protection. Metal-organic frameworks (MOFs) feature a highly ordered porous structure that can be functionalized with amine groups to enhance their CO2 adsorption capacity and stability in humid environments, making them valuable for industrial CO2 capture applications. This review summarized the research progress of amine-functionalized MOFs in carbon capture, focusing on the effects of amine functionalization on the pore structure and adsorption performance of MOFs. The main content includes the introduction methods, and material properties of different amine compounds, as well as an analysis of how these methods enhance CO2 adsorption capacity. The effects of amine functionalization on the pore structure and adsorption active sites of MOFs are systematically summarized, the capture performance under different temperatures, humidity levels, and other gas conditions is also discussed, emphasizing stability and selectivity in high-humidity environments. Finally, the article explored the prospects of amine-functionalized MOFs in industrial applications and notes that future research should focus on optimizing synthesis strategies, material regeneration, and addressing technical challenges to facilitate its application in CO2 capture.