| 초록 |
In an effort to enhance the selective capture of CO2, heat treatment of 1 M KOH-doped activated carbon (AC) under inert (N2) and reducing (NH3) atmospheres was used. With N2 only, modified adsorbent became unstable to air upon retrieval. Therefore, stabilization by amination was employed, which also enabled further use of 2 and 4 M KOH doping. Amination-stabilized 4 M KOH-doped granular coal-based AC (N-4-G-CL) achieved the highest selectivity for CO2, as adsorption of 10% and 0.3% CO2 were significantly enhanced from 0.65 and 0.03 to 2.45 and 2.03 mmol/g respectively, with negligible reduction in the adsorption of pure CO2. |
