Adsorption experiment of carbon dioxide was performed on MCM41 silica with a 30 wt .% EDA(ethylenediamine) loading at different CO2 inlet concentration and various adsorption temperature. The surface characteristics of CO2 capturing agent were carried out using BET analysis, X-ray diffraction and FT-IR. The results of BET showed 781 m2/g for MCM41 and 464 m2/g for EDA/MCM41. X-ray diffraction results reveled typical hexagonal pore system. The higher sorption capacity of EDA/MCM41 was about 80 mgco2/gsorbent with 50% CO2 inlet concentration and 303 K adsorption temperature. The isosteric heat of adsorption in 303-353 K ranged from -25.47 to -28.24 KJ/mole for EDA/MCM41, which indicates CO2-EDA/MCM41 interaction with exothermic adsorption process. Finally, the performance of EDA/MCM41 in 10 consecutive sorption-desorption runs was a stable with only a minor drop in its sorption capacity.

• 이철규(계명대학교 환경과학과) | Chul-Kyu Lee
• 최성우(계명대학교 환경과학과) | Sung-Woo Choi Corresponding author