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Initial stages of propane activation over Zn/MFI catalyst studied by in situ NMR and IR spectroscopic techniquesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Kolyagin Y.G., Ordomsky V.V., Khimyak Y.Z., Rebrov A.I., Fajula F., Ivanova I.I.
- Журнал: Journal of Catalysis
- Том: 238
- Номер: 1
- Год издания: 2006
- Издательство: Academic Press
- Местоположение издательства: United States
- Первая страница: 122
- Последняя страница: 133
- DOI: 10.1016/j.jcat.2005.11.037
- Аннотация: The early stages of propane activation over Zn-modified H-MFI catalysts were studied by in situ 13C MAS NMR and IR spectroscopic techniques. Propane 2-13C, propane 1-13C, deuterated propane, and deuterated dihydrogen were used as labelled reactants. Both techniques pointed to the formation of zinc propyl species at the onset of propane conversion. Moreover, formation of ZnOH groups simultaneously to zinc propyl species was evidenced by IR spectroscopic techniques. The results point to the propane activation through dissociative adsorption over zinc oxide species, followed by propene evolution and recombinative desorption of dihydrogen. Propene further oligomerizes over acidic sites, while dihydrogen either evolves as a final product or participates in propane hydrogenolysis into ethane and methane. At low partial pressure of reactants, H2 recombinative desorption and hydrogen evolution are favoured, whereas at high pressures, the hydrogenolysis route is preferable. © 2005 Elsevier Inc. All rights reserved.
- Добавил в систему: Колягин Юрий Геннадьевич