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자료유형
학술저널
저자정보
하은아 (공주대학교) 최윤정 (공주대학교) 이창용 (공주대학교)
저널정보
한국환경에너지공학회 환경에너지공학 열환경공학회지 제14권 제1호
발행연도
2019.7
수록면
20 - 29 (10page)

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The catalytic characteristics of alumina-supported cobalt catalysts which were prepared by sol-gel method were studied by XRD, XPS, and TPR. The SCR with CH₄ has been investigated over these catalysts with various cobalt content in a continuous flow reactor. It was found that loaded cobalt in Co/Al₂O₃ existed as Co₃O₄ and/or CoAl₂O₄ and that CoAl₂O₄ was formed on the external surface of particles of the catalyst. The formation of CoAl₂O₄ was due to the addition and mixture of cobalt solution in alumina sol. The reducibility of cobalt in Co/Al₂O₃ prepared by sol-gel method, however, was strongly lower than that prepared by impregnation. This result was due to the low reducibility of CoAl₂O₄. CH4-SCR activities of Co/Al₂O₃ increased with temperature regardless of cobalt content and NSR under the condition of different concentration of CH₄ at constant concentration of NO, 10% of cobalt content exhibited high activity at 400℃. The activities of Co/Al₂O₃ decreased as NO concentration decreased at constant NSR. The activity of the Co/Al₂O₃–2 slightly increased with the decrease of the O₂ concentration but the catalytic activities of the Co/Al₂O₃–5 and Co/Al₂O₃–7 catalyst decreased with the decrease of the O2 concentration at constant NO concentration and NSR.

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ABSTRACT
1. 서론
2. 실험 방법
3. 결과 및 고찰
4. 결론
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