Journal
MOLECULES
Volume 18, Issue 7, Pages 8289-8297Publisher
MDPI AG
DOI: 10.3390/molecules18078289
Keywords
palladium catalysts; egg-shell catalyst; partial oxidation of methane; syngas
Funding
- Ministry of Science and Technology of China [2012DFA40550]
- National Natural Science Foundation of China [21007011, 21177028]
- Ph.D. Programs Foundation of the Ministry of Education in China [20100071120012]
- Ministry of Education in China
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An egg-shell Pd/Al2O3 catalyst showed higher activity than a regular Pd/Al2O3 catalyst in the partial oxidation of methane to syngas, but a common problem of this reaction is the catalyst deactivation on stream. We attempted to modify the egg-shell catalyst via impregnation with some metal oxide additives. Although the addition of MgO did not show any beneficial effect, the addition of CaO and/or La2O3 significantly improved the stability due to the suppression of carbon deposition and phase transformation of the Al2O3 support. The catalysts were characterized by X-ray diffraction (XRD), N-2 adsorption-desorption, and thermogravimetric analysis (TGA).
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