Acidic and catalytic properties of Mo/MCM-22 in methane aromatization: an FTIR study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F03%3A00008277" target="_blank" >RIV/60461373:22310/03:00008277 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388955:_____/03:54030200

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Acidic and catalytic properties of Mo/MCM-22 in methane aromatization: an FTIR study

Popis výsledku v původním jazyce

Acidity investigation of fresh and used Mo/MCM-22 catalyst for methane aromatization is described. For determination of Bronsted acidity, connected with bridged OH groups, and the Lewis acidity, related to Al, quantitative analysis was carried out usingFTIR technique and employing d3-acetonitrile as the probe molecule. Acidity changes for both the parent zeolite and the Mo-containing zeolite were analyzed in individual periods of the catalyst development in the methane stream, i.e. during the activation period (up to 70 min), at the optimum performance (between 70 and 150 min), during catalyst deactivation (up to 10 h) and after its regeneration in oxygen. Both bridged hydroxyls (concentration 0.21 mmol/g) and Lewis acidic sites (two types; total concentration 0.14 mmol/g) were present in the parent H/MCM-22 zeolite. Molybdenum incorporation induced a decrease in the concentration of bridgedOHgroups to about one half of the original value following calcination at 450 .C, while the con

Název v anglickém jazyce

Acidic and catalytic properties of Mo/MCM-22 in methane aromatization: an FTIR study

Popis výsledku anglicky

Acidity investigation of fresh and used Mo/MCM-22 catalyst for methane aromatization is described. For determination of Bronsted acidity, connected with bridged OH groups, and the Lewis acidity, related to Al, quantitative analysis was carried out usingFTIR technique and employing d3-acetonitrile as the probe molecule. Acidity changes for both the parent zeolite and the Mo-containing zeolite were analyzed in individual periods of the catalyst development in the methane stream, i.e. during the activation period (up to 70 min), at the optimum performance (between 70 and 150 min), during catalyst deactivation (up to 10 h) and after its regeneration in oxygen. Both bridged hydroxyls (concentration 0.21 mmol/g) and Lewis acidic sites (two types; total concentration 0.14 mmol/g) were present in the parent H/MCM-22 zeolite. Molybdenum incorporation induced a decrease in the concentration of bridgedOHgroups to about one half of the original value following calcination at 450 .C, while the con

Druh

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

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

<a href="/cs/project/GA104%2F99%2F0432" target="_blank" >GA104/99/0432: Katalytická dehydrogenace a aromatizace methanu se separací produktů mikroporézními membránami</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2003

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

253

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

11

Strana od-do

271-282

Kód UT WoS článku

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EID výsledku v databázi Scopus

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