Recent progress and prospects in solid acid-catalyzed CO2 desorption from amine-rich liquid

CO2 emissions from industrial processes and their impact on climate change have gradually become major concerns. The amine-based scrubbing technology is considered a viable strategy for capturing CO2 to alleviate the climate crisis. However, the high expense of CO2 capture operations is severely hindering the further development of this technology and its application in industry. The catalytic CO2 desorption strategy has recently attracted considerable attention recently as a low-energy technology, and it has high potential for large-scale implementation. Therefore, in this review, we summarize the latest progresses in solid acid-catalyzed desorption of CO2 from various amine-rich liquids, especially monoethanolamine (MEA) solution. Solid acid catalysts (SACs) are of six types: metal oxides, molecular sieves, natural clay minerals, composite materials, organic framework materials, and carbon-based materials. These catalysts improve CO2 desorption through mechanisms that are driven by Lewis acids, Bronsted acids, and basic active sites, as is discussed in depth in this paper. The stability of the catalysts and their advantages and disadvantages are also considered. Finally, based on the characteristics of various catalysts, we comprehensively compare and analyze their industrial potential and provide some prospects regarding their future development. Moreover, to solve certain bottleneck problems in this field, the application prospects of machine learning algorithms in CO2 desorption have been discussed. Overall, this paper provides a robust theoretical basis and technical reference regarding efficient and inexpensive carbon capture.