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Application of supported perovskite-type catalysts for vehicular emission control

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Title Application of supported perovskite-type catalysts for vehicular
emission control
 
Creator Labhsetwar , Nitin
Biniwale, R B
Kumar, Rakesh
Rayalu, S S
Devotta, S
 
Subject Materials Science
 
Description Catalytic control of auto-exhaust emissions is one of the most successful applications of heterogeneous catalysis, both in
commercial and environmental point of views. Although noble metal-based catalysts have dominated this area, efforts were always
put in towards development of low cost non-noble metal-based catalysts. With the recent need of closed-coupled catalytic
converter, thermal stability requirements have also become more severe, leading to the search for stable catalytic materials. Mixed
oxides, including those perovskite type compounds with ABO3 structure have been extensively studied, mainly for their catalytic
and electrical properties. Low surface area of these catalysts has so far been the most important limitation for their catalytic
applications involving high space velocities, e.g. auto-exhaust catalysis. Various synthesis routes have been earlier attempted to
improve their surface area, yet this was much inferior than the noble metal catalysts, dispersed on high surface area alumina. The in
situ synthesis of these oxides on alumina is often associated with the formation of undesired phases, due to the reactive nature of
perovskite precursors. However, alumina washcoat, commonly used for improving the surface area of ceramic and metallic catalyst
supports, can be modified for perovskite applications. In situ synthesis of stabilized perovskites on modified alumina-washcoated
supports offer high surface area and excellent catalyst adhesion. Although, it is difficult to ascertain the presence of pure perovskite
type materials on support, such improved synthesis has resulted in remarkable improvement in their catalytic activity for their
applications in auto-exhaust catalytic converters. This review presents our work on synthesis of various improved perovskite-type
mixed oxides supported on modified alumina-washcoated cordierite honeycomb, their characterization, and detailed catalytic
evaluations for possible application in automobile pollution control.
 
Publisher Springer
 
Date 2006-03
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/983/1/labhsetwar2006.pdf
Labhsetwar , Nitin and Biniwale, R B and Kumar, Rakesh and Rayalu, S S and Devotta, S (2006) Application of supported perovskite-type catalysts for vehicular emission control. Catalysis Surveys from Asia, 10 (1). pp. 55-64. ISSN 1571-1013; 1574-9266 (Online)
 
Relation https://link.springer.com/journal/10563
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