Transient Kinetics of Toluene Interaction with V/Ti-Oxides in Anaerobic Conditions | Sciact - CRIS-система Института катализа

Transient Kinetics of Toluene Interaction with V/Ti-Oxides in Anaerobic Conditions Научная публикация

Конференция

XVI International Conference on Chemical Reactors
01-05 дек. 2003 , Berlin

Журнал

Chemical Engineering Journal
ISSN: 1385-8947 , E-ISSN: 1873-3212

Вых. Данные

Год: 2005, Том: 107, Номер: 1-3, Страницы: 147-155 Страниц : 9 DOI: 10.1016/j.cej.2004.12.025

Ключевые слова

FT-Raman spectroscopy, Kinetic modelling, Periodic operation, Toluene partial oxidation, Transient response technique, Vanadia/titania catalyst

Авторы

Bulushev Dmitri A. ¹ , Ivanov Evgeny A. ² , Reshetnikov Sergei I. ² , Kiwi-Minsker Lioubov ¹ , Renken Albert ¹

Организации

1	Swiss Federal Institute of Technology, LGRC-EPFL, CH-1015 Lausanne, Switzerland
2	Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	98-03-32395
2	European Commission	FP4-INCO-COPERNICUS

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.

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 CAPlusCA OpenAlex

Полный текст от издателя

Опубликована online:	25 янв. 2005 г.
Опубликована в печати:	15 мар. 2005 г.

Web of science:	WOS:000228417000020
Scopus:	2-s2.0-15544379990
РИНЦ:	13485594
Chemical Abstracts:	2005:334903
Chemical Abstracts (print):	143:9496
OpenAlex:	W2068781195

БД	Цитирований
Web of science	5
Scopus	7
РИНЦ	8
OpenAlex	7