Oxidative and thermal degradation of alkanolamines for a promising CO2 capture technology of absorption might cause decrease in CO2 capture efficiency and formation of hazardous byproducts. In this study, characteristics of a representative absorbent of monoehtanolamine (MEA) were examined for a long term operation using a laboratory scale absorption system. An CO2 absorption system with ID 56 mm and absorption zone height 100 cm was developed for the characterization. Absorption solution of 30 wt% MEA was circulated at 100 mL/min to treat air with 15% CO2 and 1 ppm NO at 10 L/min. Temperatures of absorber and stripper were maintained at 40℃ and 120℃, respectively. For the course of 5 weeks continuous operation, MEA concentration was decreased approximately by 70% and CO2 removal efficiency was dropped from 95% to 65%. Ionic byproducts of NH4 +, NO2 -, and NO3 - were accumulated up to 48 g/mL, 0.2 g/mL, and 1.5 g/mL, respectively, tracking the variation of MEA concentration. Formation of various organic byproducts were also observed.

1. 서 론
 2. 재료 및 방법
  2.1. 실험방법 및 실험장치
  2.2. 분석 및 측정방법
 3. 결과 및 고찰
  3.1. CO2 흡수장치 성능 및 재현성
  3.2. 장기 운전시 MEA 손실
  3.3. 질소함유 무기 이온 생성
  3.4. 유기 분해 생성물
 4. 결 론
 감사의 글
 REFERENCES

• 강지아(경북대학교 환경공학과, Department of Environmental Engineering, Kyungpook National University) | Ji-A Kang
• 우원구(경북대학교 환경공학과, Department of Environmental Engineering, Kyungpook National University) | Wongu Woo
• 임호진(경북대학교 환경공학과, Department of Environmental Engineering, Kyungpook National University) | Ho-Jin Lim Corresponding author