(377h) Adsorption Kinetics of CO2 By Amine Groups

Amine functionalized adsorbents use for CO₂ capture is a promising technique due to its several advantages that include least cost, ease of operation and its ease of regeneration ability. This study aims to investigate the adsorption of CO₂ using adsorbents modified with amine group. In addition, the adsorption kinetic models that have been used in describing CO₂ adsorption by the amine groups is provided. It is found that the adsorption rate of CO₂ onto adsorbents material modified with amine groups is highly dependent on the interaction of CO₂ with the amine groups forming carbamate and bicarbonate (in the presence of water vapor). In addition, the mass transfer of CO₂ from the bulk gas phase into the active surface sites of the adsorbent also contribute significantly to the adsorption rate.