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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
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
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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