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HWAHAK KONGHAK,
Vol.34, No.6, 694-699, 1996
Vol.34, No.6, 694-699, 1996
MeO/NMD 촉매의 일산화탄소 산화반응성
Activity of MeO/NMD Catalysts for CO Oxidation
고정층 반응기에서 이산화망간, 망간광석, MeO/NMD 복합촉매의 일산화탄소 산화반응성과 활성화에너지를 측정하여 이들의 촉매활성을 검토하였다. 이때 온도는 상온부터 400℃ 범위, 압력은 대기압하에서 실행되었다. 복합촉매는 Pt, Pd, 산화용 촉매 또는 담체로 사용가능함을 알 수 있었다. 망간광석에 소량의 금속산화물(0.5 wt%)이 담지됨에 따라서 일산화탄소 산화력의 증가를 볼 수 있었으며 검토된 금속 중 팔라듐산화물의 효과가 가장 우수함을 알 수 있었다. 담지금속들의 함량이 증가됨에 따라서 활성화에너지가 급격하게 감소하였으며 또한 활성화에너지는 순수한 이산화망간보다 망간광석이 낮음을 알 수 있었다.
The activity of natural manganese dioxide(NMD), electrolytic manganese dioxide(EMD), and metal oxide wt% in a differential plug flow reactor system in a temperature range 300-673K and under atmospheric pressure condition. The MeO/NMD composite catalysts consisted of NMD and metals such as Pt, Pd, Ru, Au, Ag Cu, Zn, CuCr prepared by wet impregnation method and calcination in air. It was found from the experiment that NMD could effectively be utilized as a catalyst as well as a support for CO oxidation. By the impregnation of metal oxides on NMD, the oxidation activity of CO was increased, and palladium oxide showed the highest increased among other metal oxides. The activation energy of MeO/NMD composite catalysts decreased with the increase of MeO content and the activation energy of NMD was lower than that of EMD.
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