Dynamic adsorption study of CO₂ adsorption by MgO/Al₂O₃

A MgO/Al₂O₃ adsorbent prepared with impregnation method was characterized by using N₂-adsorption and XRD, and its CO₂ kinetic sorption properties were studied by means of breakthrough analysis in a fixed bed flow adsorber. The effects of MgO loadings, adsorption temperatures and gas flow rates were investigated. The stability and regenerative abilities were studied by cyclic experiment. The results indicated that the optimal loading of MgO was 10%, the maximal adsorption capacities were achieved when the temperature was 50℃ and the gas flow rate was 45mL/min. The texture properties as well as the adsorption capacity were maintained in multiple cycles, thus the MgO/Al₂O₃ adsorbent could be considered as a potential CO₂ adsorption in industrial application.