Mesoporous carbon supported MgO for CO2 capture and separation of CO2/N2

Mesoporous carbon derived from pongamia pinnata fruit hulls was used as support to incorporate magnesium oxide for the study of CO 2 adsorption and separation of CO 2 /N 2 . All synthesized adsorbents were characterized by PXRD, N 2 adsorption-desorption isotherms, Raman and SEM with EDX techniques. Characterization results revealed the existence of magnesium oxide on mesoporous carbon. CO 2 adsorption on MgO incorporated mesoporous carbon was higher than bulk mesoporous carbon, due to the electrostatic interaction between magnesium oxide and CO 2 . High CO 2 adsorption capacity 1.68 mmol/g was obtained for 10 wt% MgO incorporated mesoporous carbon at 298 K, 1 bar compared to remaining loadings, because of the high content of MgO. However, the N 2 adsorption capacity decreased with the increase of MgO content due to a decrease in surface area and no interaction of the N 2 molecule with the adsorbent. The selectivity of CO 2 /N 2 was higher on 10 wt% MgO incorporated mesoporous carbon and the value was 40. The heat of CO 2 adsorption was 36KJ/mol at low coverage of CO 2 , and CO 2 adsorption capacity was constant in each adsorption cycle over the same adsorbent.