Functionalized adsorbent has been synthesized by piperazine(Pz) on activated carbon. Quantitative estimations of CO2 were undertaken using gas chromatography with GC/TCD and the prepared adsorbents were characterized by BET surface area and FT-IR. It was also studied effect of various parameters such as piperazine loadings and adsorption temperature. The specific surface area decreased from 1212.0 m2/g to 969.8 m2/g by impregnation and FT-IR revealed a N-H functional group at about 1400 cm-1 to 1700 cm-1. The CO2 adsorption capacity at 20℃ and 50∼100℃ was as follow: AC > Pz(10)-AC> Pz(30)-AC> Pz(50)-AC at 20℃ and Pz(10)-AC > AC > Pz(30)-AC> Pz(50)-AC at 50∼100℃. Therefore, for high temperature flue gas condition, the Pz(10)-AC showed the highest adsorption capacity due to physical adsorption and chemical adsorption by amino-group content. The results suggest that activated carbon impregnated with Pz is an effective adsorbent for CO2 capture from real flue gases above 50℃.

Abstract
 1. 서 론
 2. 재료 및 방법
 3. 결과 및 고찰
  3.1. 흡착온도 및 Pz 함량에 따른 이산화탄소 파과특성
  3.2. 흡착온도 및 Pz함량에 따른 이산화탄소 흡착량 비교
  3.3. 표면특성분석
 4. 결 론
 참 고 문 헌

• 최성우(계명대학교 환경과학과) | Sung-woo Choi (Department of Environmental Science and Engineering, Keimyung University) Corresponding author