Research progress on the improving effect of additives on supported amine adsorbents for carbon capture
Supported amine adsorbents are a prominent subject of research within the realm of solid adsorption techniques for CO2 capture,representing an area of considerable interest and applicability in the field of flue gas carbon capture and direct air capture technologies,and have received extensive attention.Nevertheless,there exists substantial room for improvement regarding the adsorption-desorption performance and thermochemical stability of supported amine adsorbents.This review focused on the study of the performance improvement of supported amine adsorbents through introducing additives.It provided a review of recent research on enhancing the adsorption performance of supported amine adsorbents through the utilization of additives,encompassing surfactants,amine-based additives and inorganic additives.Additionally,it delved into the achievements of research efforts aimed at enhancing the thermochemical stability of supported amine adsorbents through the application of epoxides,chelators and sulfur-containing additives.Furthermore,this review elucidated the underlying mechanisms governing the performance improvement of supported amine adsorbents via various categories of additives and summarized the performance improvement characteristics of distinct types of additives for supported amine adsorbents under different carbon capture conditions.Despite some progress in research,the performance improvement of supported amine adsorbents through additives still faced challenges.Presently,research had not fully achieved the dual objectives of enhancing the adsorption performance and thermochemical stability of supported amine adsorbents.Moreover,given the significant variation in gas composition under different carbon capture conditions,future research needed to clarify the impact of additives on the thermodynamics,kinetics and thermochemical stability of supported amine adsorbents under different carbon capture scenarios,and design additive modification strategies accordingly.
CO2 captureadsorbentsstabilityadditivessurfactantsmixing