KEPCO 전력연구원에서 개발한 고효율 습식 아민 CO2 흡수제(KoSol-4)를 적용하여 Test bed 성능시험을 수행하였다. 국내에서는 처음으로 석탄화력발전소에서 발생되는 연소 배가스를 적용하여 하루 2톤의 CO2를 처리할 수 있는 연소 후 CO2 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 CO2 제거율은 국제에너지기구 온실가스 프로그램(IEA-GHG)에서 제시하는 CO2 포집기술 성능평가 기준치(CO2 제거율: 90%)를 안정적으로 유지하였다. 또한 흡수제(KoSol-4)의 재생을 위한 스팀 사용량(재생에너지)은 3.0~3.2 GJ/tCO2이 소비되는 것으로 산출되었는데 이는 기존 상용 흡수제(MEA, Monoethanolamine)의 재생에너지 수준(약 4.09 GJ/tCO2, 본 연구) 대비 약 25% 이상 저감된 수치일 뿐만 아니라 우리나라에서 연구 중인 모든 CO2 포집기술을 통틀어 가장 우수한 성능이다. 본 연구를 통해 KEPCO 전력연구원에서 개발한 KoSol-4 흡수제 및 공정의 우수한 CO2 포집 성능을 확인할 수 있었을 뿐만 아니라, 향후 고효율 흡수제(KoSol-4)를 상용 CO2 포집플랜트에 적용할 경우 CO2 포집비용을 크게 낮출 수 있을 것으로 기대되었다.

Test bed studies with highly efficient amine CO2 solvent (KoSol-4) developed by KEPCO research institute were performed. For the first time in Korea, evaluation of post-combustion CO2 capture technology to capture 2 ton CO2/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 CO2 removal rate met the technical guideline (CO2 removal rate: 90%) suggested by IEA-GHG and that the regeneration energy of the KoSol-4 showed about 3.0~3.2 GJ/tCO2 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 CO2 capture process_x000D_ developed by KEPCO research institute. And also it was expected that the cost of CO2 avoided could be reduced drastically if the KoSol-4 is applied to the commercial scale CO2 capture plant.

CO2 Capture Chemical Absorption Solvent Regeneration Energy KoSol-4

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