Co3O4-CeO2 mixed oxide-based catalytic materials for diesel soot oxidation

0310602 - ÚACH 2009 RIV NL eng J - Journal Article
Dhakad, M. - Mitshuhashi, T. - Rayalu, S. - Doggali, P. - Bakardjieva, Snejana - Šubrt, Jan - Fino, D. - Haneda, H. - Labhsetwar, N.
Co3O4-CeO2 mixed oxide-based catalytic materials for diesel soot oxidation.
[Katalytické materiály pro oxidaci sazí z dieslových motorů na bázi směsných (Co3O4-CeO2).]
Catalysis Today. Roč. 132, 1-4 (2008), s. 188-193. ISSN 0920-5861. E-ISSN 1873-4308
R&D Projects: GA MŠMT LC523
Institutional research plan: CEZ:AV0Z40320502
Keywords : soot oxidation * diesel particulate * Co3O4-CeO2 type mixed oxide
Subject RIV: CA - Inorganic Chemistry
Impact factor: 3.004, year: 2008

Co3O4-CeO2 type mixed oxide catalyst compositions have been prepared by using co-precipitation method and, their catalytic activity towards diesel particulate matter (PM)/carbon oxidation has been evaluated under both loose and tight contact conditions. These catalysts show excellent catalytic activity for PM/carbon oxidation, despite their low surface area. The activation energy observed for non-catalyzed and catalyzed reactions are 163 kJ/mol and 140 kJ/mol, respectively, which also confirm the catalytic activity of catalyst for carbon/soot oxidation. The promotional effects of an optimum amount of cobalt oxide incorporation in ceria and presence of a small amount of potassium appears to be responsible for the excellent soot oxidation activity of this mixed oxide type material. The catalytic materials show good thermal stability, while their low cost will also add to their potential for practical applications.

Katalytické materiály pro oxidaci sazí z dieslových motorů na bázi směsných (Co3O4-CeO2).
Permanent Link: http://hdl.handle.net/11104/0162415