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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Catalytic N 2O decomposition on Pr 0.8Ba 0.2MnO 3 type perovskite catalyst for industrial emission control Tvůrce(i) 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)Zdroj.dok. Catalysis Today. - : Elsevier - ISSN 0920-5861
Roč. 198, 1-SI (2012), s. 125-132Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova Ba substituted perovskite ; catalyst ; honeycomb ; N 2O decomposition ; perovskite ; praseodymium manganate Vědní obor RIV CA - Anorganická chemie CEP LC523 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UACH-T - RVO:61388980 UT WOS 000311350000018 DOI 10.1016/j.cattod.2012.06.015 Anotace 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. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2013
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