Effect of preparation method on nature and distribution of vanadium species in vanadium-based hexagonal mesoporous silica catalysts: Impact on catalytic behavior in propane ODH

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F12%3A39895242" target="_blank" >RIV/00216275:25310/12:39895242 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apcata.2011.11.033" target="_blank" >http://dx.doi.org/10.1016/j.apcata.2011.11.033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2011.11.033" target="_blank" >10.1016/j.apcata.2011.11.033</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of preparation method on nature and distribution of vanadium species in vanadium-based hexagonal mesoporous silica catalysts: Impact on catalytic behavior in propane ODH

Popis výsledku v původním jazyce

This work reports comparative study of catalytic performance of VOx-HMS catalysts prepared by ethanolic impregnation method and direct synthesis. In order to detailed investigation of vanadium speciation depending on vanadium content and its impact on catalytic behavior in C3-ODH, number of samples in wide range of vanadium content (1-16 wt.%) was prepared by both types of preparation. Prepared catalysts were tested in the oxidative dehydrogenation of propane at 540 degrees C under different contact times and catalytic results were correlated with physicochemical characteristics of the catalysts examined by XRD, XRF, SEM, N-2 adsorption/desorption isotherms, H-2-TPR and DR-UV-visible spectroscopy. Study led to conclusion, that (i) both monomeric VOx complexes and oligomeric VOx complexes with tetrahedral coordination containing V-O-V bonds are active and selective catalytic sites for C3-ODH, (ii) active VOx species are characterized by distinct reduction peak in H-2-TPR pattern centere

Název v anglickém jazyce

Effect of preparation method on nature and distribution of vanadium species in vanadium-based hexagonal mesoporous silica catalysts: Impact on catalytic behavior in propane ODH

Popis výsledku anglicky

This work reports comparative study of catalytic performance of VOx-HMS catalysts prepared by ethanolic impregnation method and direct synthesis. In order to detailed investigation of vanadium speciation depending on vanadium content and its impact on catalytic behavior in C3-ODH, number of samples in wide range of vanadium content (1-16 wt.%) was prepared by both types of preparation. Prepared catalysts were tested in the oxidative dehydrogenation of propane at 540 degrees C under different contact times and catalytic results were correlated with physicochemical characteristics of the catalysts examined by XRD, XRF, SEM, N-2 adsorption/desorption isotherms, H-2-TPR and DR-UV-visible spectroscopy. Study led to conclusion, that (i) both monomeric VOx complexes and oligomeric VOx complexes with tetrahedral coordination containing V-O-V bonds are active and selective catalytic sites for C3-ODH, (ii) active VOx species are characterized by distinct reduction peak in H-2-TPR pattern centere

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

2012

Kód důvěrnosti údajů

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

Název periodika

Applied catalysis A: General

ISSN

0926-860X

e-ISSN

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Svazek periodika

415-416

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

29-39

Kód UT WoS článku

000301020800005

EID výsledku v databázi Scopus

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