Labhsetwar , Nitin and Biniwale, R B and Kumar, Rakesh and Bawase, M A and Rayalu, S S and Mitsuhashi, T and Haneda, H (2004) Application of catalytic materials for diesel exhaust emission control. Current Science, 87 (12). pp. 1700-1704. ISSN 0011-3891

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Perovskite type non-noble metal-based catalytic materials have been developed for their possible applications in diesel exhaust emission control. These materials have been evaluated for their applications in regeneration of diesel particulate filter (DPF) and also as diesel catalytic converter (DCC). Both the applications require low temperature oxidation catalysis properties. Temperature- programmed desorption studies revealed the lowtemperature oxygen desorption of perovskite catalyst, which may be useful for the oxidation of carbon/soot at lower temperature. Laboratory evaluation results on activated carbon show the carbon oxidation activity of the catalyst in a temperature range of 300–450°C. However, this was achieved under the tight contact of carbon and catalyst. Catalyst coated-ceramic foams have been used to fabricate laboratory prototype of regenerative type DPF. Although its evaluation on a vehicle shows significant reduction in smoke density, however, the regeneration temperature was still higher than desired. The DCC shows 10–25% reduction in smoke density depending on engine conditions. The perovskite-type catalyst appears to follow a redox mechanism for soot oxidation through oxygen removal and replenishment, while hydrocarbons adsorbed on soot particles may also help in oxidation of the carbonaceous part.

Item Type: Article
Subjects: Materials Science
Depositing User: Dr. Nitin Labhasetwar
Date Deposited: 03 Nov 2017 10:07
Last Modified: 03 Nov 2017 10:07

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