Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Preparation and Characterization of Ferrite Supported on Porous Ceramic Fiber Composites for Co2 Decomposition

이산화탄소 분해용 페라이트 담지 다공성 세라믹 섬유복합체 제조와 물성

  • Lee, Bong-Soo (Division of Ceramic and Chemical Engineering, Myongji University) ;
  • Kim, Myung-Soo (Division of Ceramic and Chemical Engineering, Myongji University) ;
  • Choi, Seung-Chul (Department of Materials Science and Engineering, Ajou University) ;
  • Oh, Jae-Hee (Department of Ceramic Engineering, Inha University) ;
  • Lee, Jae-Chun (Division of Ceramic and Chemical Engineering, Myongji University)
  • 이봉수 (명지대학교 세라믹화학공학부) ;
  • 김명수 (명지대학교 세라믹화학공학부) ;
  • 최승철 (아주대학교 재료공학과) ;
  • 오재희 (인하대학교 세라믹공학과) ;
  • 이재춘 (명지대학교 세라믹화학공학부)
  • Published : 2002.01.01
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Abstract

The decomposition and/or conversion of carbon dioxide to carbon have been studied using oxygen-deficient ferrites for the reduction of $CO_2$ emission to the atmosphere. In this work, the homogeneous precipitation method using urea decomposition was employed to induce in situ precipitation of Ni ferrite($Ni_{0.4}Fe_{2.6}O_4$) on the porous ceramic fiber support (50 mm diameter${\times}$10 mm thickness). Effects of ferrite loading conditions on the CO2 decomposition efficiency were discussed in this paper. Removal of residual chloride ions and urea by solvent exchange from the porous media after ferrite deposition apparently helps to form spinel ferrite, but does not increase the efficiency of $CO_2$ decomposition. Porous ceramic fiber composites containing 20 wt% (1g) ferrite samples showed 100% efficiency for $CO_2$decomposition during the first three minutes, but the efficiency decreased rapidly after the elapsed time of ten minutes. The characteristic reduction time for the $CO_2$ decomposition efficiency was estimated as about 3∼7 min.

대기중에 방출되는 이산화탄소 저감을 위해서 산소결핍 페라이트를 이용한 이산화탄소의 탄소 전환에 대한 연구가 이루어지고 있다. 본 연구에서는 우레아 분해를 이용한 균일침전법에 의해 Ni 페라이트 $Ni_{0.4}Fe_{2.6}O_4$를 다공성 세라믹섬유 지지체(지름 50mm, 두께 10mm)에 in-situ 하게 담지하였다. 페라이트를 다공성 세라믹섬유 지지체에 담지하는 방법이 이산화탄소 분해효율에 미치는 영향을 조사하였다. 페라이트가 담지된 시편으로부터 잔류 염소이온과 우레아를 제거하면 주 결정상으로 스피넬 구조의 페라이트를 얻을 수 있었으나 이산화탄소 분해효율이 크게 향상되지는 않았다. 페라이트가 중량 분율로 20% (1g) 담지된 다공성 세라믹섬유 복합체 시편의 경우, 초기 3분 까지는 100% 이산화탄소 분해효율을 나타내었으나 10분 경과 후에는 급격하게 감소하였다. 이산화탄소 분해효율 감쇄 특성시간은 약 3∼7분 사이로 나타났다.

Keywords

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