Modification of Co-Mn-Al mixed oxide with potassium and its effect on deep oxidation of VOC0

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F09%3A00021634" target="_blank" >RIV/60461373:22310/09:00021634 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Modification of Co-Mn-Al mixed oxide with potassium and its effect on deep oxidation of VOC0

Popis výsledku v původním jazyce

Catalytic activity of the Co-Mn-Al mixed oxide catalyst (Co:Mn:Al molar ratio of 4:1:1) modified with various amounts of potassium (0 ? 3 wt%) was examined in total oxidation of toluene and ethanol. The prepared catalysts were characterized by chemical analysis (AAS), powder X-ray diffraction (XRD), surface area measurements, temperature programmed techniques (TPR, TPD), voltammetry of microparticles, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The non-modified catalyst was composed of spinel-like Co-Mn-Al mixed oxide as the only XRD crystalline phase. The surface concentrations of metal components obtained by XPS were different from the bulk ones determined by chemical analysis and the segregation of the metal components depended onthe actual potassium content. The low K additions changed mainly the surface acid-base properties of the catalyst. According to XRD and voltammetry measurements, Mn oxides segregated from the original spinel-like phase at high concentrat

Název v anglickém jazyce

Modification of Co-Mn-Al mixed oxide with potassium and its effect on deep oxidation of VOC0

Popis výsledku anglicky

Catalytic activity of the Co-Mn-Al mixed oxide catalyst (Co:Mn:Al molar ratio of 4:1:1) modified with various amounts of potassium (0 ? 3 wt%) was examined in total oxidation of toluene and ethanol. The prepared catalysts were characterized by chemical analysis (AAS), powder X-ray diffraction (XRD), surface area measurements, temperature programmed techniques (TPR, TPD), voltammetry of microparticles, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The non-modified catalyst was composed of spinel-like Co-Mn-Al mixed oxide as the only XRD crystalline phase. The surface concentrations of metal components obtained by XPS were different from the bulk ones determined by chemical analysis and the segregation of the metal components depended onthe actual potassium content. The low K additions changed mainly the surface acid-base properties of the catalyst. According to XRD and voltammetry measurements, Mn oxides segregated from the original spinel-like phase at high concentrat

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA104%2F07%2F1400" target="_blank" >GA104/07/1400: Deposice oxidických katalyzátorů pro oxidaci VOC na tvarovaný nosič a jejich modifikace nanočásticemi drahých kovů</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Catalysis

ISSN

0926-860X

e-ISSN

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Svazek periodika

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Číslo periodika v rámci svazku

361

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

11

Strana od-do

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Kód UT WoS článku

000267092800015

EID výsledku v databázi Scopus

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