| Issue |
Korean Chemical Engineering Research,
Vol.45, No.6, 663-668, 2007
Vol.45, No.6, 663-668, 2007
금속모노리스에 부착된 Ni/CeO2-ZrO2를 이용한 메탄의 자열개질반응
Autothermal Reforming of Methane using Metallic Monolith Catalyst Coated Ni/CeO2-ZrO2
Ni/CeO2-ZrO2 촉매를 이용하여 수소 제조를 위한 메탄의 자열개질반응 특성을 조사하였다. 메탄의 자열개질반응에서 촉매의 활성과 안정성을 향상시키기 위해 알루미나가 코팅된 금속 모노리스를 사용하였으며, 금속모노리스 촉매체는 높은 반응온도에서 분말형태의 촉매에 비해 높은 메탄 전환율을 나타내었다. 자열개질반응에 있어서 H2O/CH4/O2의 비는 전환율에 영향을 미치는 중요한 변수임을 알 수 있었다. H2O/CH4 비가 증가함에 따라 수소 수율은 증가되고, 또한 O2/CH4 비가 증가함에 따라 메탄 전환율은 증가하지만 수소 수율은 감소하였다. Ni/CeO2-ZrO2 촉매에 0.5 wt%의 귀금속 촉매인 Ru 첨가로 인해 낮은 반응온도에서 촉매 활성이 향상되었다.
The autothermal reforming reaction of methane was investigated to produce hydrogen with Ni/CeO2-ZrO2 catalysts. Alumina-coated honeycomb monolith was applied in order to obtain high catalytic activity and stability in autothermal reforming of methane. Metallic monolithic catalyst showed better methane conversion than that of powder type at high reaction temperature. It was confirmed that H2O/CH4/O2 ratio was important factor in autothermal reforming reaction. H2 yield was increased as H2O/CH4 ratio increased. Methane conversion was improved as O2/CH4 ratio was increased, whereas, the yield of H2 was decreased. The catalytic activity for Ni/CeO2-ZrO2 catalyst with 0.5 wt% Ru loading was improved at low reaction temperature.
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