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Catalytic N2O decomposition on Pr0.8Ba0.2MnO3 type perovskite catalyst for industrial emission control

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Title Catalytic N2O decomposition on Pr0.8Ba0.2MnO3 type perovskite catalyst for
industrial emission control
 
Creator Kumar, Suresh
Vinu, A
Subrt, J
Bakardjieva, Snehanjana
Rayalu, Sadhana
Teraoka, Y
Labhsetwar, Nitin
 
Subject Materials Science
 
Description Ba substituted PrMnO3 type perovskite catalysts (Pr1−xBaxMnO3 with x = 0.1–0.4) have been studied for
N2O decomposition reaction. These catalysts were prepared by a combination of co-precipitation and
impregnation methods. They are characterized in detail by means of XRD, BET-SA, SEM, EDX, O2-TPD, H2-
TPR and XPS analysis. The catalytic activity of Ba substituted PrMnO3 catalyst was observed to be relatively
better than the bare catalyst, thereby showing the promotional effect of barium, and Pr0.8Ba0.2MnO3 with
20 mol% substitution was found to be the optimized composition. The Pr0.8Ba0.2MnO3 catalyst composition
was also prepared in supported form using ceramic honeycomb by following in situ co-precipitation
method and tested for N2O decomposition reaction under simulated feed conditions. Supported catalyst
shows 92% conversion of N2O at 550 ◦C with a maximum of 0.0984 mmol of N2O decomposed per gram
of the catalyst, per unit time in the presence of NO and O2, which was higher than that obtained for
unsupported catalyst. O2-TPD studies inferred that Ba incorporation results in increase of Mn4+/Mn3+
ratio of PrMnO3 catalyst, thereby confirming the substitution of Ba in perovskite structure. TPR studies
also provided the clear evidence to this effect. This improved redox property of Ba substituted perovskite
catalyst was correlated to its enhanced catalytic activity for N2O decomposition.
 
Publisher Elsevier
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://neeri.csircentral.net/1059/1/kumar2012.pdf
Kumar, Suresh and Vinu, A and Subrt, J and Bakardjieva, Snehanjana and Rayalu, Sadhana and Teraoka, Y and Labhsetwar, Nitin (2012) Catalytic N2O decomposition on Pr0.8Ba0.2MnO3 type perovskite catalyst for industrial emission control. Catalysis Today, 198. pp. 125-132. ISSN 0920-5861
 
Relation https://www.journals.elsevier.com/catalysis-today
http://neeri.csircentral.net/1059/