Conversion of ethanol to acetaldehyde over VOX-SiO2 catalysts: the effects of support texture and vanadium speciation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62243136%3A_____%2F17%3AN0000010" target="_blank" >RIV/62243136:_____/17:N0000010 - isvavai.cz</a>

Result on the web

<a href="https://link.springer.com/article/10.1007/s11144-017-1169-z" target="_blank" >https://link.springer.com/article/10.1007/s11144-017-1169-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11144-017-1169-z" target="_blank" >10.1007/s11144-017-1169-z</a>

Result language

angličtina

Original language name

Conversion of ethanol to acetaldehyde over VOX-SiO2 catalysts: the effects of support texture and vanadium speciation

Original language description

SBA-15 and fumed-silica-supported vanadium catalysts prepared by impregnation to contain 1, 5 and 10 wt% of vanadia were characterized by XRF, N2-BET, SEM, H2-TPR, DR UV–vis and Raman spectroscopy to determine the key vanadium species present in these catalysts. These catalysts were then used in the oxidation of ethanol by oxygen at 250 and 300 °C. The comparison of the catalytic performances of individual catalysts with their physico-chemical characteristics led to the conclusion that oligomeric tetrahedrally coordinated vanadium species have the highest potential for the selective oxidation of ethanol reaching high intrinsic catalytic activity and high selectivity to acetaldehyde. They differ significantly from catalysts with a high population of monomeric species, which exhibit low activity, especially at 250 °C, and high selectivity to ethylene as a product of ethanol dehydration. The observed changes in the isothermal dependence of selectivity to ethene on the conversion degree were ascribed to the auto-inhibition effect of water vapor.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

<a href="/en/project/GA15-19780S" target="_blank" >GA15-19780S: The investigation of the active sites in supported vanadia catalysts for the selective oxidation of ethanol</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Reaction Kinetics, Mechanisms and Catalysis

ISSN

1878-5204

e-ISSN

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Volume of the periodical

121

Issue of the periodical within the volume

1

Country of publishing house

HU - HUNGARY

Number of pages

17

Pages from-to

353–369

UT code for WoS article

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EID of the result in the Scopus database

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