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Application of catalytic materials for diesel exhaust emission control

IR@CSIR-NEERI

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Title Application of catalytic materials for
diesel exhaust emission control
 
Creator Labhsetwar , Nitin
Biniwale, R B
Kumar, Rakesh
Bawase, M A
Rayalu, S S
Mitsuhashi, T
Haneda, H
 
Subject Materials Science
 
Description 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.
 
Publisher Current Science Association, Bengaluru
 
Date 2004-12
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/979/1/1700.pdf
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
 
Relation http://www.currentscience.ac.in/
http://neeri.csircentral.net/979/