Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1283061 | International Journal of Hydrogen Energy | 2009 | 7 Pages |
Abstract
Catalytic behaviors of TiO2-, Zr0.5Ti0.5O2-, and ZrO2-supported Ni catalysts were investigated for oxidative steam reforming of n-C4H10 at 723Â K. The composite oxide support, Zr0.5Ti0.5O2, shows high specific surface area (136Â m2/g), leading to fine Ni particles. Thus, the Ni/Zr0.5Ti0.5O2 catalyst exhibits higher and more stable activity than that exhibited by other catalysts. However, relatively large amounts of coke are deposited on the catalyst during reaction. Thus, to retard carbon deposition, the influence of SiO2 additive was studied. Large amounts of SiO2 additive (5 or 10Â mol%) decrease initial activity; at 10Â mol%, degradation is also induced by oxidation of Ni0. However, small amounts of SiO2 additive (1.5Â mol%) effectively retard coking without lowering initial activity. The resultant Ni/Zr0.5Ti0.5O2-SiO2 (1.5Â mol%) catalyst exhibits high and stable activity without coking.
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Authors
Fumiaki Sago, Sho Fukuda, Katsutoshi Sato, Katsutoshi Nagaoka, Hiroyasu Nishiguchi, Yusaku Takita,