Partial oxidation of methane over nickel catalysts supported on various aluminas |
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Authors: | Zhong-Wen Liu Ki-Won Jun Hyun-Seog Roh Sang-Eon Park Young-Sam Oh |
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Affiliation: | (1) Present address: Chemical Technology Division, Korea Research Institute of Chemical Technology, P. O. Box 107, 305-600 Yuseong, Daejeon, Korea;(2) LNG Technology Research Center, Korea Gas Corporation, Dongchun-Dong, 406-130 Yeonsu-Ku, Incheon, Korea |
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Abstract: | Partial oxidation of methane (POM) was systematically investigated in a fixed bed reactor over 12 wt% Ni catalysts supported on α-A12O3, γ-A12O3 and θ-A12O3 which were prepared at different conditions. Results indicate that the catalytic activity toward POM strongly depends on the BET surface area of the support. All the Ni/ θ-Al2O3 catalysts showed high activity toward POM due to the less formation of inactive NiAl2O4 species, the existence of NiO, species and stable θ-Al2O3 phase. Although Ni/γ-Al2O3 showed the highest activity toward POM, long-time stability cannot be expected as a result of the deterioration of the support at higher temperature, which is revealed from BET results. From the reaction and characterization results, it is inferred that the optimal conditions for the preparation of θ-Al2O3 are 1,173 K and 12 h. |
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Keywords: | Partial Oxidation of Methane Ni Catalyst θ -A12O3 α -Al2O3 γ -A12O3 |
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