Deactivation Kinetics of V/Ti-Oxide in Toluene Partial Oxidation Full article
| Journal |
Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Output data | Year: 2001, Volume: 220, Number: 1-2, Pages: 31-39 Pages count : 9 DOI: 10.1016/S0926-860X(01)00701-3 | ||||
| Tags | Deactivation, DRIFTS in situ, Kinetic modelling, Toluene partial oxidation, V/Ti-oxide catalysts, Vanadia | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 01-03-32790 |
| 2 | Swiss National Science Foundation |
Abstract:
Deactivation kinetics of a V/Ti-oxide catalyst was studied in partial oxidation of toluene to benzaldehyde (BA) and benzoic acid (BAc) at 523–573 K. The catalyst consisted of 0.37 monolayer of VOx species and after oxidative pre-treatment contained isolated monomeric and polymeric metavanadate-like vanadia species under dehydrated conditions as was shown by FT Raman spectroscopy. Under the reaction conditions via in situ DRIFTS fast formation of adsorbed carboxylate and benzoate species was observed accompanied by disappearance of the band of the monomeric species (2038 cm−1) (polymeric species were not controlled). Slow accumulation of maleic anhydride, coupling products and/or BAc on the surface caused deactivation of the catalyst during the reaction. Temperature-programmed oxidation (TPO) after the reaction showed formation of high amounts of CO, CO2 and water. Rate constants for the steps of the toluene oxidation were derived via mathematical modelling of reaction kinetics at low conversion and constant oxygen/toluene ratio of 20:1. The model allows predicting deactivation dynamics, steady-state rates and selectivity. The highest rate constant was found for the transformation of BA into BAc explaining a low BA yield in the reaction.
Cite:
Bulushev D.A.
, Reshetnikov S.I.
, Kiwi-Minsker L.
, Renken A.
Deactivation Kinetics of V/Ti-Oxide in Toluene Partial Oxidation
Applied Catalysis A: General. 2001.
V.220. N1-2. P.31-39. DOI: 10.1016/S0926-860X(01)00701-3
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Deactivation Kinetics of V/Ti-Oxide in Toluene Partial Oxidation
Applied Catalysis A: General. 2001.
V.220. N1-2. P.31-39. DOI: 10.1016/S0926-860X(01)00701-3
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Mar 29, 2001 |
| Accepted: | May 29, 2001 |
| Published online: | Oct 3, 2001 |
| Published print: | Oct 25, 2001 |
Identifiers:
| Web of science: | WOS:000171614000004 |
| Scopus: | 2-s2.0-0035950421 |
| Elibrary: | 13385584 |
| Chemical Abstracts: | 2001:740311 |
| Chemical Abstracts (print): | 136:55515 |
| OpenAlex: | W2057804688 |