Effect of promoter on Ni/MgO catalyst in C8H18 autothermal reforming in solid oxide fuel cell system

Title
Effect of promoter on Ni/MgO catalyst in C8H18 autothermal reforming in solid oxide fuel cell system
Authors
김윤태엄지현김성호임태훈이호인
Keywords
Octane autothermal reforming; carbon deposition; Ni/MgO; Cr promoter; NiO-MgO solid solution
Issue Date
2010-08
Publisher
Applied catalysis A, General
Citation
VOL 384, NO 1-2, 10-17
Abstract
Autothermal reforming, which is a combined process of steam reforming and partial oxidation reforming, has excellent coke resistance and high efficiency in reforming reactions. Octane autothermal reforming was carried out over Ni-supported catalysts. The catalysts were prepared by normal precipitation and promoters were added by impregnation. The formation of NiO–MgO solid solution was accomplished during calcination of the Ni/MgO catalyst at 900 ℃, resulting in loss of the active Ni metal and very low catalytic activity. Therefore, all catalysts were treated by a reduction process without calcination in order to prevent the formation of NiO–MgO solid solution. Among Ni/MgO catalysts combined with various promoters such as Ag, Cr, and Cu, Ni–Cr/MgO catalyst showed the most desirable characteristics in the aspects of its activity, stability, and resistance to carbon deposition. We found an optimal condition for octane autothermal reforming when steam-to-carbon ratio and oxygen-to-carbon ratio were 1.5 and 0.5, respectively.
URI
http://pubs.kist.re.kr/handle/201004/37757
ISSN
0926-860X
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