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Autothermal Reforming of Methane Over CeO2–ZrO2–La2O3 Supported Rh Catalyst

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Abstract

Autothermal reforming of methane was studied over La-doped ceria–zirconia-supported Rh catalysts. The CH4 conversion increased from 49 to 60% on increasing the content of La3+ from 5 to 15%, while further increase in the La3+ content led to a slight decrease on both CH4 conversion and H2 selectivity. H2-TPR and UV–vis DRS spectrum showed that the interaction between Rh and the support was enhanced by increasing the content of La. We speculated that a so-called “Rh–La interfacial species” was formed on the surface of the support, which played an important role in catalytic activity. The balance between exposed Rh and the “Rh–La interfacial species” was necessary to improve the catalytic activity. Upon increasing the Rh loading on 15% La-doped ceria–zirconia support, the balance was built, i.e., CH4 conversion increased from ~60 to 69% by increasing Rh loading from 0.1 to 0.5 wt% and only 2% conversion was elevated by doubling the Rh loading from 0.5 to 1.0 wt%.

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Acknowledgments

The present work was supported by the National Natural Science Foundation of China (No. 20590365), the Hi-Tech Research and Development Program (2007AA05Z148; 2008AA050404) and the National Key Foundational Research Project of China (2004CB719506).

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Authors and Affiliations

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, People’s Republic of China

    Lei Cao, Changjun Ni, Zhongshan Yuan & Shudong Wang

  2. Graduate School of Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China

    Lei Cao

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  1. Lei Cao
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  2. Changjun Ni
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  3. Zhongshan Yuan
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  4. Shudong Wang
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Correspondence to Shudong Wang.

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Cao, L., Ni, C., Yuan, Z. et al. Autothermal Reforming of Methane Over CeO2–ZrO2–La2O3 Supported Rh Catalyst. Catal Lett 131, 474–479 (2009). https://doi.org/10.1007/s10562-009-9888-z

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  • DOI: https://doi.org/10.1007/s10562-009-9888-z

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