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Co-Mn-Al Mixed Oxides Promoted by K for Direct NO Decomposition: Effect of Preparation Parameters.
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SYSNO ASEP 0511878 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Co-Mn-Al Mixed Oxides Promoted by K for Direct NO Decomposition: Effect of Preparation Parameters. Tvůrce(i) Pacultová, K. (CZ)
Bílková, T. (CZ)
Klegová, A. (CZ)
Karásková, K. (CZ)
Fridrichová, D. (CZ)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Kiška, T. (CZ)
Balabánová, Jana (UCHP-M) RID, ORCID, SAI
Koštejn, Martin (UCHP-M) RID, SAI, ORCID
Kotarba, A. (PL)
Kaspera, W. (PL)
Stelmachowski, P. (PL)
Słowik, G. (PL)
Obalová, L. (CZ)Číslo článku 593 Zdroj.dok. Catalysts. - : MDPI
Roč. 9, č. 7 (2019)Poč.str. 26 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova nitric oxide ; catalytic decomposition ; potassium promoter 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 000478652600009 EID SCOPUS 85069483028 DOI 10.3390/catal9070593 Anotace Fundamental research on direct NO decomposition is still needed for the design of a suffciently active, stable and selective catalyst. Co-based mixed oxides promoted by alkali metals
are promising catalysts for direct NO decomposition, but which parameters play the key role in NO decomposition over mixed oxide catalysts? How do applied preparation conditions a ect
the obtained catalyst’s properties? Co4MnAlOx mixed oxides promoted by potassium calcined at various conditions were tested for direct NO decomposition with the aim to determine their
activity, stability and selectivity. The catalysts were prepared by co-precipitation of the corresponding nitrates and subsequently promoted by KNO3. The catalysts were characterized by atomic absorption spectrometry (AAS)/inductive coupled plasma (ICP), X-ray photoelectron spectrometry (XPS), XRD, N2 physisorption, temperature programmed desorption ofCO2 (TPD-CO2), temperature programmed reduction by hydrogen (TPR-H2), species-resolved thermal alkali desorption (SR-TAD), work function measurement and STEM. The preparation procedure affects physico-chemical properties of the catalysts, especially those that are associated with the potassium promoter presence. The addition of K is essential for catalytic activity, as it substantially ffects the catalyst reducibility and basicity—key properties of a deNO catalyst. However, SR-TAD revealed that potassium migration, redistribution and volatilization are strongly dependent on the catalyst calcination temperature—higher calcination temperature leads to potassium stabilization. It also caused the formation of new phases and thus affected the main properties—SBET, crystallinity and residual potassium amount.Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2020 Elektronická adresa https://www.mdpi.com/2073-4344/9/7/593
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