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M/Al₂O₃ (M=Mn, Fe, Co, Ni, Cu) 촉매 상에서 에탄올 자열개질반응에 의한 수소 제조
윤민혜,서정길,조경민,박선영,김필,송인규 한국청정기술학회 2007 청정기술 Vol.13 No.4
상용 알루미나(Al₂O₃)에 담지된 M/Al₂O₃ (M = Mn, Fe, Co, Ni, Cu) 촉매를 함침법에 의해 제조하였으며, 이를 에탄올 자열개질반응에 의한 수소제조에 적용하였다. 각각의 촉매는 고유한 금속상을 가지는 것으로 나타났으며, 생성물의 분포는 활성금속의 종류에 크게 의존하였다. 제조된 촉매 중에서, Ni/Al₂O₃ 및 Co/Al₂O₃는 에탄올 자열개질반응에서 매우 우수한 촉매활성을 보였다. 그러나 두 촉매상에서의 반응메커니즘은 서로 다른 것으로 나타났다. Ni/Al₂O₃ 촉매는 500℃의 반응온도에서 100%의 에탄올 전환율을 보였으나, 수소 선택도에서는 시간에 따라 급격한 저하현상을 나타내었다. 한편 Co/Al₂O₃촉매는 수소 선택도 면에서 우수한 활성을 보였으나, 에탄올 전환율이 저조하여 수소 수율에는 큰 변화가 나타나지 않았다. M/Al₂O₃ (M = Mn, Fe, Co, Ni, Cu) catalysts supported on commercial alumina (Al₂O₃) were prepared by an impregnation method, and were applied to the hydrogen production by auto-thermal reforming of ethanol. It was revealed that each catalyst retained its own metallic phase and product distribution strongly depended on the identity of active metal. Among the catalysts prepared, Ni/Al₂O₃ and Co/Al₂O₃ showed the best catalytic performance in the auto-thermal reforming of ethanol. However, the reaction mechanisms over these two catalysts were different. Ni/Al₂O₃ catalyst showed 100% ethanol conversion at 500 , but it exhibited a rapid decrease in hydrogen selectivity. Although Co/Al₂O₃ catalyst showed an excellent performance in hydrogen selectivity, on the other hand, no significant improvement in hydrogen yield was observed due to the low ethanol conversion over the catalyst.
Hydrogen production technology from bio-derived source
윤민혜 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
With increasing concern about global warming and fossil fuel depletion, hydrogen is considered to be the most viable energy due to its clean, renewable, and non-polluting nature. Among renewable energy sources for hydrogen production, ethanol has attracted much attention as a promising hydrogen source because of its low toxicity, easy handling, transportation, and storage. In hydrogen production by auto-thermal reforming of ethanol, nickel-based catalysts have been widely investigated due to their excellent C-C bond cleavage ability and low cost. In this work, the effect of support on the catalytic properties and catalytic performance of supported Ni catalysts in hydrogen production by auto-thermal reforming of ethanol was investigated.