Sciact
  • EN
  • RU

Zn-Promoted Hydrogen Exchange for Methane and Ethane on Zn/H-BEA Zeolite: In situ 1H MAS NMR Kinetic Study Научная публикация

Журнал Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694
Вых. Данные Год: 2008, Том: 253, Номер: 1, Страницы: 11-21 Страниц : 11 DOI: 10.1016/j.jcat.2007.11.002
Авторы Stepanov Alexander G. 1 , Arzumanov Sergei S. 1 , Gabrienko Anton A. 2 , Toktarev Alexander V. 1 , Parmon Valentin N. 1 , Freude Dieter 3
Организации
1 Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2 Department of Natural Sciences, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
3 Universität Leipzig, Abteilung Grenzflächenphysik, Linnéstraße 5, 04103 Leipzig, Germany
Реферат: Hydrogen (H/D) exchange between Brønsted acid sites of both the acidic form of zeolite beta (H-BEA) and Zn-loaded zeolite beta (Zn/H-BEA) and small alkanes (methane and ethane) has been studied by monitoring the kinetics of the exchange in situ with 1H MAS NMR spectroscopy within the temperature range of 433–563 K. On Zn/H-BEA, the exchange has been found to be more than two orders of magnitude faster compared to that on H-BEA. The decrease of reaction temperature and activation energy of the exchange on Zn/H-BEA (86–88 kJ mol−1) compared to the acidic form of zeolite H-BEA (138 kJ mol−1) has been rationalized by the promoting effect of zinc. We propose that the mechanism of the H/D exchange on Zn/H-BEA involves Zn-alkyl species as intermediates.
Библиографическая ссылка: Stepanov A.G. , Arzumanov S.S. , Gabrienko A.A. , Toktarev A.V. , Parmon V.N. , Freude D.
Zn-Promoted Hydrogen Exchange for Methane and Ethane on Zn/H-BEA Zeolite: In situ 1H MAS NMR Kinetic Study
Journal of Catalysis. 2008. V.253. N1. P.11-21. DOI: 10.1016/j.jcat.2007.11.002 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact
Даты:
Поступила в редакцию: 18 июл. 2007 г.
Принята к публикации: 3 нояб. 2007 г.
Опубликована online: 28 нояб. 2007 г.
Опубликована в печати: 1 янв. 2008 г.
Идентификаторы БД:
Web of science: WOS:000257176900002
Scopus: 2-s2.0-37049000406
РИНЦ: 13576710
Chemical Abstracts: 2007:1440103
Chemical Abstracts (print): 148:191546
OpenAlex: W2038833638
Sciact: 18386
Цитирование в БД:
БД Цитирований
Scopus 70
OpenAlex 74
Альметрики: