Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Carbonation of coal fly ash for construction materials

탄산화 건자재 제조를 위한 석탄 비산회의 탄산화

  • Park, Jun-Young (Department of the Materials Engineering, Kyonggi University) ;
  • Kim, Yoo-Taek (Department of the Materials Engineering, Kyonggi University) ;
  • Kim, Hyun-Jung (Department of the Materials Engineering, Kyonggi University)
  • 박준영 (경기대학교 신소재공학부) ;
  • 김유택 (경기대학교 신소재공학부) ;
  • 김현정 (경기대학교 신소재공학부)
  • Received : 2012.04.13
  • Accepted : 2012.05.29
  • Published : 2012.06.30
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Abstract

Carbon dioxide ($CO_2$) could be stored in the form of Ca and Mg compounds including alkaline earth metal by carbonation. The possibility of $CO_2$ storage was tested by using desulfurized ash from fluidized bed type boiler as raw material. Autoclave was used for maintaining the reaction pressure and temperature for the carbonation. The analysis of weight change rate, XRD, and TG/DTA proved that more than 15 % of carbonation rate was obtained under 10 $kgf/cm^2$ and $120^{\circ}C$-10 min.

이산화탄소($CO_2$)를 폐기물에 안정하게 고정화시키기 위하여 탄산화 가능한 알칼리 토금속인 Ca와 Mg 성분을 다량 포함한 석탄재에 CO2를 저장하여 건자재의 제조 가능성을 연구하였다. 초기 실험으로는 Ca 산화물과 수화물을 사용하였으며, $CO_2$ 저장 반응기로는 Autoclave를 사용하여 일정한 압력과 온도에서 조성을 변화시켜 탄산화를 시행하였다. 탄산화 된 시편의 무게변화율, X-선 회절분석 및 시차열분석을 통하여 관찰한 결과 $Ca^{2+}$의 이온용출 반응에 의해 탄산화가 진행되었음을 확인할 수 있었다. 10 $kgf/cm^2$의 압력과 $120^{\circ}C$에서 10분간 온도를 유지한 분위기에서 폐기물자원 원료에 15 % 이상의 탄산화율을 얻는 것이 가능할 것으로 판단되었다.

Keywords

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