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Magnesium E ect in K/Co-Mg-Mn-Al Mixed Oxide Catalyst for Direct NO Decomposition.
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SYSNO ASEP 0540443 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnesium E ect in K/Co-Mg-Mn-Al Mixed Oxide Catalyst for Direct NO Decomposition. Author(s) Karásková, K. (CZ)
Pacultová, K. (CZ)
Klegová, A. (CZ)
Fridrichová, D. (CZ)
Valášková, M. (CZ)
Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Stelmachowski, P. (PL)
Kotarba, A. (PL)
Obalová, L. (CZ)Article number 931 Source Title Catalysts. - : MDPI
Roč. 10, č. 8 (2020)Number of pages 22 s. Language eng - English Country CH - Switzerland Keywords cobalt mixed oxide ; alkali promoter ; nitric oxide ; catalytic decomposition Subject RIV CI - Industrial Chemistry, Chemical Engineering OECD category Chemical process engineering R&D Projects GA18-19519S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UCHP-M - RVO:67985858 UT WOS 000564805000001 EID SCOPUS 85089600056 DOI 10.3390/catal10080931 Annotation Emission of nitric oxide represents a serious environmental problem since it contributes to the formation of acid rain and photochemical smog. Potassium-modified Co-Mn-Al mixed oxide is an effective catalyst for NO decomposition. However, there are problems related to the thermal instability of potassium species and a high content of toxic and expensive cobalt. The reported research aimed to determine whether these shortcomings can be overcome by replacing cobalt with magnesium. Therefore, a series of Co-Mg-Mn-Al mixed oxides with different Co/Mg molar ratio and promoted by various content of potassium was investigated. The catalysts were thoroughly characterized by atomic absorption spectroscopy (AAS), temperature-programmed reduction by hydrogen (TPR-H2), temperature-programmed desorption of CO2 (TPD-CO2), X-ray powder diffraction (XRD), N2 physisorption, species-resolved thermal alkali desorption (SR-TAD), and tested in direct NO decomposition with and without the addition of oxygen and water vapor. Partial substitution of magnesium for cobalt did not cause an activity decrease when the optimal molar ratio of K/Co on the normalized surface area was maintained. It means that the portion of expensive and toxic cobalt can be successfully replaced by magnesium without any decrease in catalytic activity. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2021 Electronic address file:///C:/Users/jirsova/AppData/Local/Temp/catalysts-10-00931.pdf
Number of the records: 1