Study on the Matching Properties of Amines and Resin Support and Their Role in Enhancing CO₂ Adsorption Capacity

Solid amine adsorbents have demonstrated considerable potential for application in carbon capture systems within postcombustion technologies. The performance of the adsorbent was significantly affected by both the type of support material and the organic amine utilized. The purpose of this study is to examine how the compatibility between organic amines and different porous materials (resins) affects CO2 capture performance. Triethylenetetramine (TETA)-functionalized solid adsorbents are widely used in CO2 capture and separation due to their excellent adsorption capacity, recyclability, and scalability. In this study, four resinsADS-17, XAD, DA201D, and AB-8are selected as support to examine the effect of the interaction between TETA and these four resins on CO2 adsorption performance. Through studies on adsorption performance, thermogravimetric analysis, kinetics, activation energy, and diffusion mechanisms, it was determined that the adsorption process involves a synergistic combination of physical and chemical adsorption, with the rate-limiting step being film diffusion. TETA-XAD and TETA-DA201D demonstrate higher adsorption rates and superior performance than the other two adsorbents. This work offers fresh insights and potential directions for exploring the compatibility mechanisms between organic amines and porous solids.