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Catalytic N 2O decomposition on Pr 0.8Ba 0.2MnO 3 type perovskite catalyst for industrial emission control
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SYSNO ASEP 0383336 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Catalytic N 2O decomposition on Pr 0.8Ba 0.2MnO 3 type perovskite catalyst for industrial emission control Author(s) Kumar, S. (IN)
Vinu, A. (AU)
Šubrt, Jan (UACH-T) SAI, RID
Bakardjieva, Snejana (UACH-T) SAI, RID, ORCID
Rayalu, S. (IN)
Teraoka, Y. (JP)
Labhsetwar, N. (IN)Source Title Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 198, 1-SI (2012), s. 125-132Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords Ba substituted perovskite ; catalyst ; honeycomb ; N 2O decomposition ; perovskite ; praseodymium manganate Subject RIV CA - Inorganic Chemistry R&D Projects LC523 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UACH-T - RVO:61388980 UT WOS 000311350000018 DOI 10.1016/j.cattod.2012.06.015 Annotation Ba substituted PrMnO 3 type perovskite catalysts (Pr 1-x Ba x MnO 3 with x = 0.1-0.4) have been studied for N 2O 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, O 2-TPD, H 2-TPR and XPS analysis. The catalytic activity of Ba substituted PrMnO 3 catalyst was observed to be relatively better than the bare catalyst, thereby showing the promotional effect of barium, and Pr 0.8Ba 0.2MnO 3 with 20 mol% substitution was found to be the optimized composition. The Pr 0.8Ba 0.2MnO 3 catalyst composition was also prepared in supported form using ceramic honeycomb by following in situ co-precipitation method and tested for N 2O decomposition reaction under simulated feed conditions. Supported catalyst shows 92% conversion of N 2O at 550 °C with a maximum of 0.0984 mmol of N 2O decomposed per gram of the catalyst, per unit time in the presence of NO and O 2, which was higher than that obtained for unsupported catalyst. O 2-TPD studies inferred that Ba incorporation results in increase of Mn 4+/Mn 3+ ratio of PrMnO 3 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 N 2O decomposition. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2013
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