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A Study of Reactivity Improvement of Ni-based Methane Steam Reforming Catalysts by Small Addition of Noble Metals  

Jeong, Jin-Hyeok (Dept. of Chemical Engineering, Kyongpook National University)
Koo, Kee-Young (Dept. of Chemical Engineering, Korea Advanced Institute of Science and Technology)
Seo, Yu-Teak (New Energy Research Dept., Korea Institute of Energy Research)
Seo, Dong-Joo (New Energy Research Dept., Korea Institute of Energy Research)
Roh, Hyun-Seog (New Energy Research Dept., Korea Institute of Energy Research)
Seo, Yong-Seog (New Energy Research Dept., Korea Institute of Energy Research)
Lee, Deuk-Ki (Dept. of Environmental Engineering, Gwangju University)
Kim, Dong-Hyun (Dept. of Chemical Engineering, Kyongpook National University)
Yoon, Wang-Lai (New Energy Research Dept., Korea Institute of Energy Research)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.17, no.3, 2006 , pp. 248-254 More about this Journal
Abstract
The promotion effects of noble metals upon the activity and reducibility in steam methane reforming over $Ni/MgAl_2O_4$ catalysts were investigated. While $Ni/MgAl_2O_4$ catalysts require the pre-reduction by $H_2$, the noble metal-added catalysts show high catalytic activities without pre-treatment. According to $CH_4$-TPR, the addition of noble metal makes the $Ni/MgAl_2O_4$ catalyst easily reducible. The reduction degree of NiO in the noble metal-added catalysts after using at $650^{\circ}C$ without pre-reduction was $15{\sim}20%$, and was lower than that in the $H_2$-reduced $Ni/MgAl_2O_4$ catalyst(reduction degree=27%). The enhancement of the catalytic activity over noble metal-added catalysts results from easier reducibility by addition of noble metal and the synergy effect between noble metal and Ni.
Keywords
steam reforming; noble metal-promotion; auto-activation; reduction degree;
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