Sciact
Toggle navigation
  • EN
  • RU

Разделы:

  • Статьи
  • Книги
  • Доклады на конференциях
  • Тезисы докладов
  • Патенты

Carbonylation of Dimethyl Ether with CO on Solid 12-Tungstophosphoric Acid: In Situ Magic Angle Spinning NMR Monitoring of the Reaction Kinetics Научная публикация

Общая информация Язык: Английский, Жанр: Статья (Full article),
Статус опубликования: Опубликована, Оригинальность: Оригинальная
Журнал The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455
Вых. Данные Год: 2013, Том: 117, Номер: 21, Страницы: 11168-11175 Страниц : 8 DOI: 10.1021/jp401604r
Авторы Kazantsev Maxim S. 1 , Luzgin Mikhail V. 1 , Stepanov Alexander G. 1
Организации
1 Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia

Реферат: Knowledge of the elementary steps of the reaction on the surface of a heterogeneous catalyst is crucial for understanding the reaction mechanism. This valuable information could be provided by in situ monitoring of the reaction with solid-state NMR spectroscopy. In this paper, the kinetics of the dimethyl ether (DME) carbonylation on 12-tungstophosphoric acid has been followed with high temperature H-1 magic angle spinning (MAS) NMR. The equilibrium of the initial ether activation toward the intermediate surface methoxy species has been examined with C-13 MAS NMR as well. The energy profile of DME carbonylation with CO to the Keggin acetate on H3PW12O40 has been established. The apparent activation energy of the carbonylation, 95 +/- 10 kJ mol(-1), represents a sum (within experimental error) of the standard enthalpy of the methoxy group formation, 57 +/- 4 kJ mol(-1), and the activation barrier of the rate-determining step of the process, the interaction between methoxy group and carbon monoxide, 50 +/- 4 kJ mol(-1).
Библиографическая ссылка: Kazantsev M.S. , Luzgin M.V. , Stepanov A.G.
Carbonylation of Dimethyl Ether with CO on Solid 12-Tungstophosphoric Acid: In Situ Magic Angle Spinning NMR Monitoring of the Reaction Kinetics
The Journal of Physical Chemistry C. 2013. V.117. N21. P.11168-11175. DOI: 10.1021/jp401604r WOS Scopus РИНЦ
Даты:
Поступила в редакцию: 14 февр. 2013 г.
Принята к публикации: 23 апр. 2013 г.
Опубликована online: 16 мая 2013 г.
Опубликована в печати: 30 мая 2013 г.
Идентификаторы:
Web of science WOS:000319896700033
Scopus 2-s2.0-84878376656
РИНЦ 20436282
Chemical Abstracts 2013:633940
Chemical Abstracts (print) 158:650858
Альметрики: