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Precipitated K-Promoted Co-Mn-Al Mixed Oxides for Direct NO Decomposition: Preparation and Properties.
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SYSNO ASEP 0506324 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Precipitated K-Promoted Co-Mn-Al Mixed Oxides for Direct NO Decomposition: Preparation and Properties. Tvůrce(i) Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Pacultová, K. (CZ)
Balabánová, Jana (UCHP-M) RID, ORCID, SAI
Karásková, K. (CZ)
Klegová, A. (CZ)
Bílková, T. (CZ)
Jandová, Věra (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Martaus, A. (PL)
Kotarba, A. (PL)
Obalová, L. (CZ)Zdroj.dok. Catalysts. - : MDPI
Roč. 9, č. 7 (2019), s. 592Poč.str. 19 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova NO decomposition ; Co–Mn–Al mixed oxides ; catalyst preparation Vědní obor RIV CI - Průmyslová chemie a chemické inženýrství Obor OECD Chemical process engineering CEP GA18-19519S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000478652600008 EID SCOPUS 85070692834 DOI 10.3390/catal9070592 Anotace Direct decomposition of nitric oxide (NO) proceeds over Co-Mn-Al mixed oxides promoted by potassium. In this study, answers to the following questions have been searched: Do the properties of the K-promoted Co-Mn-Al catalysts prepared by different methods differ from each other? The K-precipitated Co-Mn-Al oxide catalysts were prepared by the precipitation of metal nitrates with a solution of K 2 CO 3 /KOH, followed by the washing of the precipitate to different degrees of residual K amounts, and by cthe alcination of the precursors at 500 • C. The properties of the prepared catalysts were compared with those of the best catalyst prepared by the K-impregnation of a wet cake of Co-Mn-Al oxide precursors. The solids were characterized by chemical analysis, DTG, XRD, N 2 physisorption, FTIR, temperature programmed reduction (H 2-TPR), temperature programmed CO 2 desorption (CO 2-TPD), X-ray photoelectron spectrometry (XPS), and the species-resolved thermal alkali desorption method (SR-TAD). The washing of the K-precipitated cake resulted in decreasing the K amount in the solid, which affected the basicity, reducibility, and non-linearly catalytic activity in NO decomposition. The highest activity was found at ca 8 wt.% of K, while that of the best K-impregnated wet cake catalyst was at about 2 wt.% of K. The optimization of the cake washing conditions led to a higher catalytic activity. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2020 Elektronická adresa https://www.mdpi.com/2073-4344/9/7/592
Počet záznamů: 1