Methane combustion over Pd/ZrO2/SiC,Pd/CeO2/SiC,and Pd/Zr0.5Ce0.5O2/SiC catalysts |
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| Authors: | Xiaoning Guo Guojuan Zhi Xiaoyan Yan Guoqiang Jin Xiangyun Guo Pascal Brault |
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| Affiliation: | 1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Taiyuan 030001, PR China;2. GREMI UMR6606 CNRS — Université d''Orléans BP6744, 45067 Orleans Cedex2, France;3. Graduate University of the Chinese Academy of Sciences, Beijing 100039, PR China |
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| Abstract: | The performances of different promoters (CeO2, ZrO2 and Ce0.5Zr0.5O2 solid solution) modified Pd/SiC catalysts for methane combustion are studied. XRD and XPS results showed that Zr4+ could be incorporated into the CeO2 lattice to form Zr0.5Ce0.5O2 solid solution. The catalytic activities of Pd/CeO2/SiC and Pd/ZrO2/SiC are lower than that of Pd/Zr0.5Ce0.5O2/SiC. The Pd/Zr0.5Ce0.5O2/SiC catalyst can ignite the reaction at 240 °C and obtain a methane conversion of 100% at 340 °C, and keep 100% methane conversion after 10 reaction cycles. These results indicate that active metallic nanoparticles are well stabilized on the SiC surface while the promoters serve as oxygen reservoir and retain good redox properties. |
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| Keywords: | High surface area SiC Pd/SiC catalysts Zr0 5Ce0 5O2 solid solution Methane combustion |
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