Surface oxidation of activated carbon pellets by hydrogen peroxide for preparation of CO2 adsorbent

This work attempted to use H2O2 as an oxidant for the incorporation of surface oxygen functionalities (SOFs) on activated carbon in the preparation of a CO2 adsorbent. Experimental results showed that oxidation at lowered temperature improved both structural and chemical properties more than those at ambient temperature, although oxidation at this temperature with 30% H2O2 incorporated the highest amount of useful SOFs for amination purpose. pHpzc value was most significantly reduced by altering the temperature either way while dilution seemed to have positive impact regarding this property. Pre-treatment ultimately enhanced the selectivity for CO2 adsorption as well as its capacity.