CO2Adsorption on Porous Materials: Experimental and Simulation Study

Abstract

Removal and sequestration of CO 2 from flue gas has been proposed as one of the most reliable solutions to mitigate globe greenhouse emissions. Adsorption technology based on porous adsorbent is known to be one of the most efficient processes for the CO 2 capture from flue gas. The key issue of this technology is to find the adsorbent with high adsorption capacity and selectivity for CO 2 . In this chapter, both the experimental and the computer simulation works about the CO 2 adsorption behavior on porous materials in our laboratory were introduced. In the experimental works, the mesoporous materials such as MCM-41 and SBA-15 were selected as the fundamental adsorbent. After surface modification by aminosilane, the amine groups became active centers and the CO 2 adsorption capacity was obviously increased due to the chemisorption. It is shown that the dual amine groups of AEAPMDS had better effect on CO 2 adsorption than the single amine group of APTS. The best CO 2 adsorption capacity of MCM-41-AEAPMDS was 2.20 mmol·g -1 at room temperature. Another effective way was incorporation metal Mg into the mesoporous materials. By various impregnating or doping methods, such as the co-condensation, the dispersion with the enhancement of Al 3+ or amine, and the ionic exchange, a suitable amount of Mg 2+ can be successfully introduced into MCM-41 and SBA-15, which effectively increased the CO 2 adsorption capacity. Different pore structures had their corresponding optimized methods,…