화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of the Korean Industrial and Engineering Chemistry, Vol.19, No.6, 645-651, December, 2008
Export Citation
연소전 이산화탄소 포집을 위한 N-methyldiethanolamine과 Piperazine 혼합 수용액의 이산화탄소 흡수
Absorption of CO2 Using Mixed Aqueous Solution of N-methyldiethanolamine with Piperazine for Pre-combustion CO2 Capture
장원진, 윤여일, 박상도1, 이영우2, 백일현†
  • 한국에너지기술연구원 온실가스연구센터
  • 1한국에너지기술연구원 이산화탄소저감및처리사업단
  • 2충남대학교 바이오응용화학부
Won Jin Jang, Yeo Il Yoon, Sang Do Park1, Young Woo Rhee2, and Il Hyun Baek†
  • Greenhouse Gas Research Center, Korea Institute of Energy Research, Daejeon 305-343, Korea
  • 1Carbon Dioxide Reduction & Sequestration R&D Center, Korea Institute of Energy Research, Daejeon 305-343, Korea
  • 2Department of Bio-Applied Chemistry, Chungnam National University, Daejeon 305-764, Korea
E-mail:
초록
본 연구에서는 30, 40, 50 wt% MDEA (N-methyldiethanolamine) 수용액을 이용하여 0∼50 bar, 40∼80 ℃의 조업조건에서 이산화탄소 흡수평형실험을 수행하여 연소전 이산화탄소 포집에 적용 가능한 고압조건에 대한 정보를 알고자 하였다. 또한 MDEA의 반응 속도를 증가시키기 위하여 piperazine 5.0∼10.0 wt%를 첨가한 후 이산화탄소 흡수실험을 수행하였다. 그 결과 수용액 상 MDEA의 농도, 반응 온도가 증가함에 따라 평형 압력이 증가하였으며 반응온도가 높을수록 흡수속도가 증가하였다. Piperazine을 첨가한 MDEA 수용액은 MDEA 40 wt% 단독 흡수제에 비해 초기 반응에서 2.5배에 가까운 반응속도와 16% 가량 증대된 흡수능을 보였다.
In this study, the new solubility data at high pressure condition applicable to pre-combustion CO2 capture system were found. Experiments were conducted within the temperature range of 40∼80 ℃ while increasing the pressure from 0 to 50 bar. The effect of MDEA (N-methyldiethanolamine) concentration was studied by varying the concentration from 30 to 50 wt%. In order to improve the absorption rate of MDEA, piperazine was added in ranging of 5∼10 wt% into the MDEA solution as a activator. From this experiment, the equilibrium partial pressure was increased with increasing MDEA concentration in absorbent and reaction temperature. Also absorption rate was increased with increasing the reaction temperature. It was noted that the mixture of piperazine and MDEA aqueous solution showed faster absorption rate by 2.5 times than only the MDEA aqueous solution with 40 wt% cencentration at initial reaction stage and also increased absorption capacity by 16%.
Keywords:absorption;carbon dioxide;high pressure;MDEA;piperazine
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