Low Cost, Ceria Promoted Perovskite Type Catalysts for Diesel Soot Oxidation |
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Authors: | M Dhakad S S Rayalu Rakesh Kumar Pradip Doggali S Bakardjieva J Subrt T Mitsuhashi H Haneda Nitin Labhsetwar |
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Affiliation: | (1) National Environmental Engineering Research Institute (NEERI), Nehru Marg, Nagpur, 440020, India;(2) Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, Řež, Prague, 250 68, Czech Republic;(3) Advanced Materials Laboratory, National Institute for Materials Science, 1-1Namiki, Tsukuba Ibaraki , 3050044, Japan |
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Abstract: | Perovskite type catalysts with SrCoO3 and Sr0.8Ce0.2CoO3 compositions have been prepared by co-precipitation and other methods and, their catalytic activity towards diesel particulate
matter (PM)/carbon oxidation has been evaluated under the loose contact condition. These catalysts show excellent catalytic
activity for PM/carbon oxidation, despite their low surface area and under the loose contact condition. The synergistic effects
of Ce incorporation in perovskite and presence of a small amount of potassium appears to be responsible for the high soot
oxidation activity of these perovskite type materials. The Ce incorporation seems to be contributing by enhancing the redox
property of the catalyst, while it appears unlikely that potassium is contributing by improving the catalyst–soot contact
through its volatization. The catalysts show excellent thermal stability and stable activity under repeated cycles of use. |
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Keywords: | Soot oxidation Perovskite Diesel emissions DPF |
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