Pre-oxidation effect on the ammoxidation activity of palm shell-based activated carbon for CO2 adsorption
Volume Title: 1
Modification of activated carbon (AC) with basic nitrogen surface groups is a promising method for obtaining an efficient carbon dioxide (CO2) adsorbent. In order to ascertain if the presence of oxygen functionalities before ammonia treatment could improve in some way the CO2 capture performance, two different approaches were considered: ammonia treatment without preliminary oxidation and ammoxidation of oxidized samples. The characterization of modified samples was performed by several analyses. The result indicated that oxidation followed by high-temperature ammonia treatment could introduce different nitrogen functionalities to the carbon surface, reaching maximum uptake of up to 30.04 (mg CO2/g adsorbent) at 105 °C.