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Modification of Co-Mn-Al Mixed Oxide with Potassium and Its Effect on Deep Oxidation of VOC
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SYSNO ASEP 0327237 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modification of Co-Mn-Al Mixed Oxide with Potassium and Its Effect on Deep Oxidation of VOC Title Modifikace směsných oxidů Co-Mn-Al draslíkem a jeho vliv na úplnou oxidaci VOC Author(s) Jirátová, Květa (UCHP-M) RID, ORCID, SAI
Gaálová, Jana (UCHP-M) RID, SAI, ORCID
Klempa, Jan (UCHP-M)
Grygar, Tomáš (UACH-T)
Bastl, Zdeněk (UFCH-W) RID, ORCID
Kovanda, F. (CZ)Source Title Applied Catalysis A - General. - : ELSEVIER SCIENCE BV - ISSN 0926-860X
Roč. 361, 1-2 (2009), s. 106-116Number of pages 11 s. Language eng - English Country NL - Netherlands Keywords mixed oxide catalysts ; VOC total oxidation ; potassium promoter Subject RIV CC - Organic Chemistry R&D Projects GA104/07/1400 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40720504 - UCHP-M (2005-2011) AV0Z40320502 - UACH-T (2005-2011) AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000267092800015 DOI 10.1016/j.apcata.2009.04.004 Annotation Catalytic activity of the Co4MnAl mixed oxide catalyst modified with various amounts of potassium was examined in total oxidation of toluene and ethanol. The prepared catalysts were characterized by AAS, XRD, porous structure, TPR, TPD, voltammetry, Raman spectroscopy and XPS. The highest conversion in toluene oxidation was achieved with catalyst containing ca 1wt % K, while in ethanol oxidation the catalysts activity gradually increased with increasing potassium content up to 3 wt % K, but also increased acetaldehyde concentration. Any reaction byproducts were not observed in toluene oxidation. Catalytic activity in ethanol oxidation is connected with the presence of MnO2 in the catalyst. XPS spectroscopy proved a correlation between concentration surface oxygen and activity in ethanol oxidation. According to XRD and voltammetry measurements, the catalysts with high concentration of potassium comprised some amount of other oxide phase of birnessite type. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2010
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