Partial oxidation of methane over Rh/supported-ceria catalysts: Effect of catalyst reducibility and redox cycles
Partial oxidation of methane (POM) was studied over Rh/(Ce0.56Zr0.44)O2 x, Rh/(Ce0.91Gd0.09)O2 x, Rh/(Ce0.71Gd0.29)O2 x and Rh/(Ce0.88La0.12)O2 x. The effect of catalyst reducibility and redox cycles was investigated. It was found that the type of doped-ceria support and its reducibility played an important role in catalyst activity. It was also observed that redox cycles had a positive influence on H2 production, which was enhanced as the number of redox cycle increased. Results of carbon formation are discussed as a function of ionic conductivity. Temperature programmed reduction (TPR) profiles, BET surface area, ionic conductivity and XRD patterns were determined to characterize catalysts. Catalytic tests revealed that of the materials tested, Rh/(Ce0.56Zr0.44)O2 x was the most active material for the production of syngas, which correlates with its TPR profile. It was observed that doping CeO2 with Zr, rather than with La or Gd caused an enhanced reducibility of Rh/supported-ceria catalysts.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR
- Sponsoring Organization:
- USDOE - Office of Fossil Energy (FE)
- DOE Contract Number:
- None cited
- OSTI ID:
- 935012
- Report Number(s):
- DOE/NETL-IR-2008-230; NETL-TPR-1996; TRN: US200815%%91
- Journal Information:
- International Journal of Hydrogen Energy, Vol. 33, Issue 11; ISSN 0360-3199
- Publisher:
- Published by Elsevier Ltd. on behalf of International Association for Hydrogen Energy
- Country of Publication:
- United States
- Language:
- English
Similar Records
Hydrogen production over Ni/ceria-supported catalysts by partial oxidation of methane
Effects of nanocrystalline CeO2 supports on the properties and performance of Ni–Rh bimetallic catalyst for oxidative steam reforming of ethanol