Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Test Bed Studies with Highly Efficient Amine CO2 Solvent (KoSol-4)

고효율 습식 아민 CO2 흡수제(KoSol-4)를 적용한 Test bed 성능시험

  • Lee, Ji Hyun (Technology Commercialization Office, KEPCO Research Institute) ;
  • Kwak, No-Sang (Technology Commercialization Office, KEPCO Research Institute) ;
  • Lee, In Young (Technology Commercialization Office, KEPCO Research Institute) ;
  • Jang, Kyung Ryoung (Technology Commercialization Office, KEPCO Research Institute) ;
  • Jang, Se Gyu (Technology Commercialization Office, KEPCO Research Institute) ;
  • Lee, Kyung Ja (Technology Commercialization Office, KEPCO Research Institute) ;
  • Han, Gwang Su (Korea Midland Power Company) ;
  • Oh, Dong-Hun (Korea Midland Power Company) ;
  • Shim, Jae-Goo (Technology Commercialization Office, KEPCO Research Institute)
  • 이지현 (KEPCO 전력연구원 사업화기술개발실) ;
  • 곽노상 (KEPCO 전력연구원 사업화기술개발실) ;
  • 이인영 (KEPCO 전력연구원 사업화기술개발실) ;
  • 장경룡 (KEPCO 전력연구원 사업화기술개발실) ;
  • 장세규 (KEPCO 전력연구원 사업화기술개발실) ;
  • 이경자 (KEPCO 전력연구원 사업화기술개발실) ;
  • 한광수 (한국중부발전(주) 발전처) ;
  • 오동훈 (한국중부발전(주) 발전처) ;
  • 심재구 (KEPCO 전력연구원 사업화기술개발실)
  • Received : 2013.01.17
  • Accepted : 2013.02.20
  • Published : 2013.04.01
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Abstract

Test bed studies with highly efficient amine $CO_2$ solvent (KoSol-4) developed by KEPCO research institute were performed. For the first time in Korea, evaluation of post-combustion $CO_2$ capture technology to capture 2 ton $CO_2$/day from a slipstream of the flue gas from a coal-fired power station was performed. Also the analysis of solvent regeneration energy was conducted to suggest the reliable performance data of the KoSol-4 solvent. For this purpose, we have tested 5 campaigns changing the operating conditions of the solvent flow rate and the stripper pressure. The overall results of these campaigns showed that the $CO_2$ removal rate met the technical guideline ($CO_2$ removal rate: 90%) suggested by IEA-GHG and that the regeneration energy of the KoSol-4 showed about 3.0~3.2 GJ/$tCO_2$ which was, compared to that of the commercial solvent MEA (Monoethanolamine), about 25% reduction of regeneration energy. Based on these results, we could confirm the good performance of the KoSol-4 solvent and the $CO_2$ capture process developed by KEPCO research institute. And also it was expected that the cost of $CO_2$ avoided could be reduced drastically if the KoSol-4 is applied to the commercial scale $CO_2$ capture plant.

KEPCO 전력연구원에서 개발한 고효율 습식 아민 $CO_2$ 흡수제(KoSol-4)를 적용하여 Test bed 성능시험을 수행하였다. 국내에서는 처음으로 석탄화력발전소에서 발생되는 연소 배가스를 적용하여 하루 2톤의 $CO_2$를 처리할 수 있는 연소 후 $CO_2$ 포집기술의 성능을 확인하였으며 또한 국내에서는 유일하게 공정운전에 소요되는 재생에너지 소비량을 실험적으로 측정함으로써 KoSol-4 흡수제의 성능에 대한 신뢰성 있는 데이터를 제시하였다. 흡수제 순환량 및 재생탑 운전압력을 대상으로 한 변수 실험 결과 Test bed 연속운전은 안정적으로 수행되었고, 흡수탑에서의 $CO_2$ 제거율은 국제에너지기구 온실가스 프로그램(IEA-GHG)에서 제시하는 $CO_2$ 포집기술 성능평가 기준치($CO_2$ 제거율: 90%)를 안정적으로 유지하였다. 또한 흡수제(KoSol-4)의 재생을 위한 스팀 사용량(재생에너지)은 3.0~3.2 GJ/$tCO_2$이 소비되는 것으로 산출되었는데 이는 기존 상용 흡수제(MEA, Monoethanolamine)의 재생에너지 수준(약 4.09 GJ/$tCO_2$, 본 연구) 대비 약 25% 이상 저감된 수치일 뿐만 아니라 우리나라에서 연구 중인 모든 $CO_2$ 포집기술을 통틀어 가장 우수한 성능이다. 본 연구를 통해 KEPCO 전력연구원에서 개발한 KoSol-4 흡수제 및 공정의 우수한 $CO_2$ 포집 성능을 확인할 수 있었을 뿐만 아니라, 향후 고효율 흡수제(KoSol-4)를 상용 $CO_2$ 포집플랜트에 적용할 경우 $CO_2$ 포집비용을 크게 낮출 수 있을 것으로 기대되었다.

Keywords

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