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Deactivation Kinetics of V/Ti-Oxide in Toluene Partial Oxidation Научная публикация

Журнал Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875
Вых. Данные Год: 2001, Том: 220, Номер: 1-2, Страницы: 31-39 Страниц : 9 DOI: 10.1016/S0926-860X(01)00701-3
Ключевые слова Deactivation, DRIFTS in situ, Kinetic modelling, Toluene partial oxidation, V/Ti-oxide catalysts, Vanadia
Авторы Bulushev Dmitri A. 1 , 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 01-03-32790
2 Swiss National Science Foundation

Реферат: 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.
Библиографическая ссылка: 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 CAPlusCA OpenAlex
Файлы: Полный текст от издателя
Даты:
Поступила в редакцию: 29 мар. 2001 г.
Принята к публикации: 29 мая 2001 г.
Опубликована online: 3 окт. 2001 г.
Опубликована в печати: 25 окт. 2001 г.
Идентификаторы БД:
Web of science: WOS:000171614000004
Scopus: 2-s2.0-0035950421
РИНЦ: 13385584
Chemical Abstracts: 2001:740311
Chemical Abstracts (print): 136:55515
OpenAlex: W2057804688
Цитирование в БД:
БД Цитирований
Web of science 27
Scopus 30
РИНЦ 29
OpenAlex 27
Альметрики: