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

Autoři: Bulánek Roman | Raabová Kateřina | Košová-Kučerová Gabriela | Čapek Libor

Rok: 2007

Druh publikace: ostatní - přednáška nebo poster

Název zdroje: EuropaCat VIII

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Amoxidace propanu na Fe/zeolitech: Vliv reakčních podmínek a složení katalyzátoru	V této studii byl zkoumán vliv koncentrace železa a struktury jeho komplexů na katalytickou aktivity Fe-silikalitů v přímé amoxidaci propanu. Výsledky ukazují schopnost izolovaných iontů železa v silikátové matrici katalyzovat amoxidaci propanu na akrylonitril.	propen;katalýza;amoxidace;akrylonitril;Fe zeolity
eng	Ammoxidation of Propane over Fe/zeolites: Effect of Reaction Variables and Catalyst Composition and Structure	In this study, the effects of iron concentration and constitution, zeolite matrix composition and reaction conditions on catalytic activity of Fe-zeolites in direct ammoxidation of propane to acrylonitrile are investigated and compared at conditions using oxygen or nitrous oxide or their mixture as oxidants. A set of catalysts of MFI and MTW structure topology with Fe species (concentration ranging in Si/Fe ratio from 40 to 950) introduced during zeolite synthesis were characterized by ESR and UV-vis spectroscopy and tested in ammoxidation reaction at 540 °C. The results of this study show the possibility to use Fe-zeolites in direct ammoxidation of propane to acrylonitrile and acetonitrile. Ammoxidation of propane proceed on special extra-framework Fe ions exclusively generated by hydrolysis of framework Si-O-Fe bonds. The strong synergetic effect of small addition of N2O into reaction mixture was observed. The advantage of this catalytic system is its catalytic stability in time on stream.	Propene;Catalysis;Ammoxidation;Acrylonitrile;Fe zeolites

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