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Received October 21, 2008
Accepted December 1, 2008
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CuFe2O4을 이용한 메탄부분산화 특성 연구
A Study of Methane Partial Oxidation Characteristics on CuFe2O4
1충남대학교 화학공학과, 305-764 대전시 유성구 궁동 220 2한국에너지기술연구원, 305-343 대전시 유성구 궁동 71-2 3국민대학교 나노전자물리학과, 136-702 서울시 성북구 정릉동 861-1
1Department of Chemical Engineering, Chungnam National University, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 2Hydrogen Energy Research Center, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon 305-343, Korea 3Department of Chemical Engineering, Chungnam National University,, 220 Gung-dong, Yuseong-gu, Daejeon 305-764, Korea 4Department of Physics, Kookmin University, 861-1 Chongnang-dong, Songbuk-gu, Seoul 136-702, Korea
Korean Chemical Engineering Research, December 2008, 46(6), 1113-1118(6), NONE Epub 29 December 2008
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Abstract
CuFe2O4와 Fe3O4의 탄소 침적 및 환원 특성을 900 ℃에서 TGA, XRD, SEM, TEM 등의 분석 및 반응 후 가스조성분석을 통하여 연구하였다. XRD 분석결과 환원된 Fe3O4는 Fe(iron)와 graphite(C) 그리고 Fe3C으로 구성되어 있는것으로 나타났다. 반면에, 환원된 CuFe2O4에서는 graphite나 Fe3C가 나타나지 않았다. SEM을 이용하여 표면 구조를 관찰한 결과 환원된 Fe3O4의 표면이 탄소로 뒤덮여 있는 것을 확인할 수 있었다. 이와 달리 CuFe2O4에서는 CH4 전환율 및 환원속도가 높았고, 환원반응 후 탄소량 추정결과 Fe3O4에서보다 훨씬 낮게 나타났다. TEM 분석결과 Fe3O4 입자로부터 탄소가 판상구조의 형태로 성장한 것을 확인할 수 있었다.
Characteristics of reduction properties and carbon deposition of CuFe2O4 and Fe3O4 were investigated by using TGA, XRD, SEM, TEM and gas analysis at 900 ℃. XRD analyses indicated that the reduced Fe3O4 was composed of Fe, graphite and Fe3C phases. In contrast, the reduced CuFe2O4 did not show the graphite or Fe3C phases. It was observed by SEM analysis that the surface of the Fe3O4 was completely covered with carbon, after methane partial oxidation. From gas analysis, CuFe2O4 showed much higher methane conversion and reduction kinetics as compared to the Fe3O4 under the same reaction conditions and the estimated carbon deposition amounts on the reduced CuFe2O4 was much lower than those on the reduced Fe3O4 during the syngas production process. It was found by TEM that carbon on the reduced Fe3O4 particles has a platelet shape.
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