Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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The Simultaneous Absorption Rate of CO2/SO2/NO2 from Flue Gas with Aqueous Alkanolamine Solutions

알카놀아민 수용액을 이용한 연소배가스 중의 CO2/SO2/NO2 동시 흡수속도에 관한 연구

  • Seo, Jong-Beom (Department of Environmental Engineering, Pusan National University) ;
  • Choi, Won-Joon (Greenhouse Gas Research Center, Korea Institute of Energy Research) ;
  • Kim, Jae-Won (Union steel building) ;
  • Choi, Bong-Wook (Water Quality Institute of Ulsan Metropolitan) ;
  • Oh, Kwang-Joong (Department of Environmental Engineering, Pusan National University)
  • 서종범 (부산대학교 환경공학과) ;
  • 최원준 (한국에너지기술연구원 온실가스연구센터) ;
  • 김재원 (동국제강(주)) ;
  • 최봉욱 (울산광역시 상수도사업본부) ;
  • 오광중 (부산대학교 환경공학과)
  • Received : 2009.05.12
  • Accepted : 2009.08.18
  • Published : 2009.10.31
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Abstract

In this study, alkanolamine was used to achieve high absorption rates for $CO_2$ as suggested at several literatures. The absorption rates of aqueous AMP and MEA solutions with $CO_2$, $SO_2$, $NO_2$ were measured using a stirredcell reactor. The reaction rate constants were determined from the measured absorption rates. The performances were evaluated under various operating conditions. As a result, the reactions with $SO_2$, $NO_2$ into aqueous AMP and MEA solutions were classified as an instantaneous reaction respectively. The absorption rates increased with increase of the reaction temperature and the concentration of absorbents. The simultaneous absorption rate of $CO_2/SO_2/NO_2$ into 3, 5, 10 wt.% MEA at various pressure of $CO_2/SO_2/NO_2$, was more increased 14~20% than AMP solution. We investigated the effect of $SO_2$ and $NO_2$ on the simultaneous absorption of $CO_2/SO_2/NO_2$ from a flue gas. The performances were evaluated under various operating conditions in order to investigate the absorption characteristic.

알카놀아민흡수제에 대한 $CO_2/SO_2/NO_2$의 흡수속도를 살펴보기 위해 현재 널리 사용되는 흡수제인 2-amino-2-methyl-1-propanol(AMP)와 monoethanolamine(MEA)를 비교하기 위하여 평면교반조에서 $CO_2/SO_2/NO_2$의 흡수속도실험을 수행하여 흡수속도와 반응속도상수를 구하였다. 반응속도상수는 실험값으로부터 구할 수 있으며 실험은 다양한 실험조건에서 수행되었다. 각각의 흡수제에 대하여 3, 5, 10 wt.%으로 농도가 증가함에 따라 흡수속도는 AMP와 MEA AMP가 MEA에 비해서 약 14~20% 높은 것으로 나타났다. $CO_2$, $SO_2$ 그리고 $NO_2$는 각각의 영역에서 기-액 접촉계면을 통해 액상으로 전달되는 기체의 확산속도와 액상 내에서 일어나는 반응속도의 상대적 크기에 따른 흡수속도를 예측할 수 있다. 또한 $CO_2$ 흡수공정에 있어서 일정분압 이상의 $SO_2$와 $NO_2$는 $CO_2$ 흡수속도 및 흡수용량에 영향이 있기 때문에 흡수탑으로 유입되기 전 복합가스의 분압조정이 반드시 필요할 것으로 판단된다.

Keywords

Acknowledgement

Supported by : Korea Ministry of Environment (MOE)

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