Ammoxidation of Propane over Fe-zeolites: Effect of Reaction Variables and Catalyst Composition and Structure

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Ammoxidation of Propane over Fe-zeolites: Effect of Reaction Variables and Catalyst Composition and Structure

Popis výsledku v původním jazyce

A series of Fe-silicalite catalysts with tailored dispersion of Fe sites ranging from almost exclusively isolated Fe ions via oligonuclear cluster to Fe2O3 particles were characterized by UV-vis and ESR spectroscopy. The same catalysts were tested in thedirect ammoxidation of propane at 540 °C in the mixture of molecular oxygen and nitrous oxide. Obtained catalytic results were compared with spectroscopic characterization. The presented results clearly shown that the changes in the catalytic performance of investigated catalysts are in correspondence with results of spectroscopic characterization. Acrylonitrile is produced on extra-framework Fe species exclusively generated by hydrolysis of framework Si-O-Fe bonds both during reaction and by steamingin water vapor at 600 °C as was evidenced by UV-vis and ESR spectroscopy. We supposed that active sites have character of well isolated extraframework sites with tetrahedral coordination characterized by UV bands below 300 nm and ESR sign

Název v anglickém jazyce

Ammoxidation of Propane over Fe-zeolites: Effect of Reaction Variables and Catalyst Composition and Structure

Popis výsledku anglicky

A series of Fe-silicalite catalysts with tailored dispersion of Fe sites ranging from almost exclusively isolated Fe ions via oligonuclear cluster to Fe2O3 particles were characterized by UV-vis and ESR spectroscopy. The same catalysts were tested in thedirect ammoxidation of propane at 540 °C in the mixture of molecular oxygen and nitrous oxide. Obtained catalytic results were compared with spectroscopic characterization. The presented results clearly shown that the changes in the catalytic performance of investigated catalysts are in correspondence with results of spectroscopic characterization. Acrylonitrile is produced on extra-framework Fe species exclusively generated by hydrolysis of framework Si-O-Fe bonds both during reaction and by steamingin water vapor at 600 °C as was evidenced by UV-vis and ESR spectroscopy. We supposed that active sites have character of well isolated extraframework sites with tetrahedral coordination characterized by UV bands below 300 nm and ESR sign

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Catalysis Today

ISSN

0920-5861

e-ISSN

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Svazek periodika

141

Číslo periodika v rámci svazku

3-4

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

000264816500003

EID výsledku v databázi Scopus

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