Abstract
Ni catalysts supported on various solid solutions of ZrO 2 with alkaline earth oxide and/or rare earth oxide were synthesized. The catalytic activities were compared for partial oxidation of methane and autothermal reforming of methane. For partial oxidation of methane, the Ni catalyst supported on a CaO–ZrO 2 solid solution showed a high activity. Incorporation of CaO in the ZrO 2 matrix was effective for increasing the reduction rate of the NiO particles and for decreasing the coke formation. On the other hand, the Ni particles supported on the CaO–CeO 2–ZrO 2 solid solution had a strong interaction with the support, and the Ni particles showed high activity and stability for autothermal reforming of methane.
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