Transient Kinetics of Toluene Interaction with V/Ti-Oxides in Anaerobic Conditions Full article
| Conference |
XVI International Conference on Chemical Reactors 01-05 Dec 2003 , Berlin |
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| Journal |
Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212 |
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| Output data | Year: 2005, Volume: 107, Number: 1-3, Pages: 147-155 Pages count : 9 DOI: 10.1016/j.cej.2004.12.025 | ||||
| Tags | FT-Raman spectroscopy, Kinetic modelling, Periodic operation, Toluene partial oxidation, Transient response technique, Vanadia/titania catalyst | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 98-03-32395 |
| 2 | European Commission | FP4-INCO-COPERNICUS |
Abstract:
Toluene interaction with the catalysts consisting of 0.35, 0.62, 0.75 and 3.7 monolayers (ML) of VOx supported on anatase–titania, containing potassium, was studied by transient response techniques at 523–673 K. FT-Raman spectroscopy under dehydrated conditions was used to determine the state of vanadia. K-perturbed (1020 cm−1) and K-doped (990 cm−1) monomeric vanadia species as well as “amorphous” KVO3 (960–940 cm−1) were found at vanadia coverage less than a monolayer. Bulk V2O5 (994 cm−1) was present only in the 3.7 ML V/TiO2 catalyst as a dominant species. Benzaldehyde (BA), total oxidation products and surface carbon-containing species were the main products of the toluene interaction. The proposed reaction network involves five steps and two types of oxygen sites. Both the BA and CO2 formation increased with the concentration of vanadia. The former is determined mainly by nucleophilic-lattice oxygen that is involved in the monolayer vanadia species. The latter as well as the formation of the main part of surface carbon-containing species increased much more steeply being dependent, probably, from electrophilic oxygen abundant in polymerised vanadia species and V2O5. The performed kinetic modelling satisfactorily describes the response curves of BA, CO2 and toluene obtained during the toluene interaction with the pre-oxidised 0.35–0.75 ML V/TiO2 catalysts. The presence of bulk V2O5 in the 3.7 ML V/TiO2 catalyst seems to provide some change in the reaction mechanism demanding a modification of the reaction scheme.
Cite:
Bulushev D.A.
, Ivanov E.A.
, Reshetnikov S.I.
, Kiwi-Minsker L.
, Renken A.
Transient Kinetics of Toluene Interaction with V/Ti-Oxides in Anaerobic Conditions
Chemical Engineering Journal. 2005.
V.107. N1-3. P.147-155. DOI: 10.1016/j.cej.2004.12.025
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Transient Kinetics of Toluene Interaction with V/Ti-Oxides in Anaerobic Conditions
Chemical Engineering Journal. 2005.
V.107. N1-3. P.147-155. DOI: 10.1016/j.cej.2004.12.025
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Files:
Full text from publisher
Dates:
| Published online: | Jan 25, 2005 |
| Published print: | Mar 15, 2005 |
Identifiers:
| Web of science: | WOS:000228417000020 |
| Scopus: | 2-s2.0-15544379990 |
| Elibrary: | 13485594 |
| Chemical Abstracts: | 2005:334903 |
| Chemical Abstracts (print): | 143:9496 |
| OpenAlex: | W2068781195 |