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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received December 26, 2008
Accepted January 5, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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메탄 자열개질 반응에 대한 Ni/CeO2-ZrO2 촉매의 영향

Influence of Ni/CeO2-ZrO2 Catalysts on Methane Autothermal Reforming

강민구 이태준 이종대^†

Min Goo Kang Tae Jun Lee Jong Dae Lee^†

충북대학교 화학공학부, 361-763 충북 청주시 흥덕구 성봉로 410

School of Chemical Engineering, Chungbuk National University, 410 Sungbong-ro, Heungduk-gu, Cheong-ju, Chungbuk 361-763, Korea

jdlee@chungbuk.ac.kr

Korean Chemical Engineering Research, February 2009, 47(1), 17-23(7), NONE Epub 27 February 2009

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Abstract

알루미나가 코팅된 허니컴 구조의 금속모노리스에 담지된 Ni/CeXZr(1-X)O2 촉매특성이 메탄의 자열개질 반응에 대해 연구되었다. Ce/Zr 비를 변화시킨 촉매 중 Ni/Ce0.80Zr0.20O2 촉매가 가장 높은 CH4 전환율을 나타내었다. Ni/Ce0.80Zr0.20O2 촉매의 Ni 함량에 따른 영향이 조사되었고, 15 wt%의 Ni을 담지하였을 때 가장 우수한 활성을 보여주었다. 또한 H2O/CH4 비가 증가할수록 H2 수율은 증가하였다. O2/CH4 비가 증가할수록 CH4 전환율은 향상되고, 반면에 H2 수율은 감소하였다. GHSV=30,000 h-1, S/C/O=2/1/0.5, 반응온도=800 ℃에서 30시간 자열 개질반응을 테스트 한 결과, _x000D_ Ni(15wt%)/Ce0.80Zr0.20O2 촉매가 우수한 CH4 전환율(≥99%)과 안정성을 보여주었다.

The catalytic behavior of Ni/CeXZr(1-X)O2 loaded on the alumina coated honeycomb monolith was studied for the autothermal reforming reaction of methane. Among the catalysts with the different Ce/Zr ratios, the Ni/Ce0.80Z0.20O2 Catalyst showed the highest conversion of methane. By investigating the effect of Ni content on the Ni/Ce0.80Zr0.20O2 catalysts, the catalyst loaded with 15wt% Ni had the highest activity. Also, 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. Among the catalysts tested for 30 hours, Ni(15 wt%)/Ce0.80Zr0.20O2 showed the excellent conversion(≥99%) of methane and the stability at the condition of GHSV=30,000 h-1, feed ratio S/C/O=2/1/0.5 and reaction temperature 800 ℃.

Keywords

Autothermal Reforming Ni Catalyst Methane Monolith Hydrogen

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