Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Study on preparation of precipitated calcium carbonate using recycling water of ready-mixed Concrete

레미콘 회수수를 이용한 침강성 탄산칼슘 제조에 관한 연구

  • Received : 2016.04.29
  • Accepted : 2016.05.18
  • Published : 2016.06.30
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Abstract

In this study, a liquid carbonation method was applied for producing precipitate calcium carbonate by liquid-liquid reaction. Also a shuttle mechanism of wet chemical absorption using MEA was utilized. The high concentration $CO_2$(A) and exhaust gas(B) was used for collecting carbon dioxide in the 30% MEA aqueous solution, and $CO_2$ was fixed with rate of 0.35 mg of $CO_2$ per mg of sludge through the liquid carbonation process. It was found from SEM data that calcium carbonate was mainly made up with spherical vaerite with the mixing of a small quantity of calcite.

본 연구에서는 액-액 반응에 의한 액상탄산화법을 이용하여 탄산칼슘을 제조하였다. MEA를 사용하여 습식화학수법의 셔틀메카니즘을 도입하였다. MEA 30% 수용액에 고농도 이산화탄소(A)와 배기가스(B)를 사용하여 이산화탄소를 포집하였으며, 액상탄산화과정을 통해 슬러지 mg 당 0.35 mg의 이산화탄소를 고정하였다. 최종생성물의 SEM 분석결과 탄산칼슘의 구조는 calcite가 혼합되어 있으나 대부분 구형 vaterite가 생성되었다.

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References

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