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Comparative Study of Vanadium Supported on MCM-36 and MCM-22 and Their Catalytic Perfomance in C-3-ODH

Rok: 2015

Druh publikace: článek v odborném periodiku

Název zdroje: Industrial & Engineering Chemistry Reseach

Název nakladatele: American Chemical Society

Místo vydání: Washington

Strana od-do: 2030-2039

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Srovnávací studie V-MCM-36 a V-MCM-22 a jejich katalytické aktivity v C-3-ODH	V této práci byly úspěšně připraveny V-MCM-36 a V-MCM-22 katalyzátory pomocí impregnace matrice, použitím vanadyl acetoacetonátu jako prekurzoru a jeho následnou iontovou výměnou během kalcinace.	ODH; propan; MCM; vanad; charakterizace
eng	Comparative Study of Vanadium Supported on MCM-36 and MCM-22 and Their Catalytic Perfomance in C-3-ODH	In this work, we report successful preparation of hierarchical V-MCM-36 zeolitic catalyst. Vanadium was introduced onto the zeolite support by impregnation, using vanadyl acetylacetonate as a metal precursor and its subsequent solid state ion exchange during calcination. A conventional three-dimensional V-MCM-22 zeolite was prepared by the same way. Both zeolitic catalysts were characterized by nitrogen adsorption isotherms, X-ray fluorescence, temperature-programmed reduction by hydrogen (H-2 -TPR), EPR, FT-IR, diffuse reflectance UVvis, and Raman spectroscopy. The effect of pillaring and the presence of a combination of micro- and mesopores on catalytic behavior were tested in the oxidative dehydrogenation of propane (C3ODH) at 540 degrees C. Obtained results clearly showed that activity of vanadium in zeolitic support is very similar to activity of vanadium in mesoporous silica catalysts. It was also found that hierarchical catalyst is slightly more selective toward propene and exhibits more stable activity than three-dimensional V-MCM-22 catalyst due to a lower rate of carbon deposit formation.	ODH; propane; MCM; vanadium; characterization

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