화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.20, No.1, 42-50, March, 2014
Export Citation
페로니켈 슬래그로 부터 제조된 Mg(OH)2를 이용한 CO2 고정화
CO2 Fixation by Magnesium Hydroxide from Ferro-Nickel Slag
송호양, 서종범1, 강성규2, 김인득3, 최봉욱, 오광중†
  • 부산대학교 사회환경시스템공학과, 609-735 부산광역시 금정구 장전동 산30
  • 1현대제철(주) 기술연구소, 343-711 충남 당진 송악읍 고대리 167-32
  • 2백구엔지니어링(주) 환경R&D 부서, 440-803 경기 수원시 장안구 송죽동
  • 3부산광역시 연제구청 환경위생과, 611-703 부산광역시 연제구 연제로 2
Hao-Yang Song, Jong-Beom Seo1, Seong-Kuy Kang2, In-Deuk Kim3, Bong-Wook Choi, and Kwang-Joong Oh†
  • Department of Civil and Environmental Engineering, Pusan National University, San 30 Jangjeon-dong, Geumjeong-gu, Busan 605-735, Korea
  • 1Technical Research Center, Hyundai Steel company, 167-32 Kodae-ri, Songak-eup, Dangin-si, Chungnam, Korea
  • 2Department of Environmental R&D, BK Environmental Construction, Songjuk-dong, Jangan-gu, Suwon-si, Gyeonggi 440-803, Korea
  • 3Environment & Sanitation division, Busan Metropolitan City Yeonjegu, 2 Yeonje-ro, Yeonje-gu, Busan 611-703, Korea
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초록
본 논문은 페로니켈 슬래그를 이용하여 간접적으로 CO2를 고정화시키는 기술에 대한 연구를 하였으며, 효율적으로 Mg를 추출하여 제조된 Mg(OH)2의 CO2 고정화 최적 조건을 제시하고자 하였다. 실험 결과, 최적의 추출조건은 1 M H2SO4, 반응 온도 333 K이었으며, 용출액에 NaOH를 첨가하여 pH값을 8까지 높일 경우, 침전물은 Fe2O3로 확인되었다. 또한 pH 값이 11 까지 높아질 때 , 그 성분은 Mg(OH)2로 나타났다. 이렇게 제조된 Mg(OH)2 slurry 용액을 CO2 고정화실험에서 준 2차 탄산화 반응 모델을 통해 적용한 결과, 반응온도 및 초기 CO2분압에 따라 초기 CO2의 고정화 속도를 증진할 수 있는 반면 반응온도가 323 K 이상 높아질 경우, 고정화속도가 감소하는 것으로 나타났다. 또한 CO2 고정화반응 시 이온을 조사한 결과, CO2를 고정화 할 수 있는 최적의 pH 조건으로 8.38 이상 유지해야 할 것으로 판단되었다. 종합적으로 본 연구에서는 페로니켈 슬래그를 이용하여 CO2를 고정화하기 위한 최적의 조건을 도출하였으며, 향후 CO2를 고정화 하기 위한 연구의 기초자료로 활용 할 수 있을 것으로 판단된다.
In this study, the Mg(OH)2 slurry was made form ferro-nickel slag and then used for CO2 sequestration. The experiments were in the order as leaching step, precipitation, carbonation experiments. According to the leaching results, the optimal leaching conditions were H2SO4 concentration of 1 M and the temperature of 333 K. In the Mg(OH)2 manufacturing step, NaOH was added to increase the pH upto 8, the first precipitation was confirmed as Fe2O3. After removal the first precipitation, the pH was upto 11, the Mg(OH)2 was generated by XRD analysis. The Mg(OH)2 slurry was used for CO2 sequestration. The pseudo-second-order carbonation model was used to apply for CO2 sequestration. The CO2 sequestration rate was increased by the CO2 partial pressure and temperature. However, CO2 sequestration rate was decreased when temperature upto 323 K. After CO2 sequestrated by Mg(OH)2, the CO2 can be sequestrated stable as MgCO3. This study also presented optimal sequestration condition was the pH upto 8.38, the maximum MgCO3 can be generated. This study can be used as the basic material for CO2 sequestration by ferro-nickel slag at pilot scale in the future.
Keywords:Ferro-nickel slag;Kinetic modeling of sequestered;CO2 sequestration rate
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