The "Alkyl" and "Carbenium" Pathways of Methane Activation on Ga-Modified Zeolite BEA: 13C Solid-State NMR and GC-MS Study of Methane Aromatization in the Presence of Higher Alkane Научная публикация
| Журнал |
The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
||
|---|---|---|---|
| Вых. Данные | Год: 2010, Том: 114, Номер: 49, Страницы: 21555-21561 Страниц : 7 DOI: 10.1021/jp1078899 | ||
| Ключевые слова | TEMPERATURE NONOXIDATIVE ACTIVATION; DENSITY-FUNCTIONAL THEORY; SHORT-CHAIN ALKANES; NONFRAMEWORK GALLIUM; LIGHT ALKANES; CO-REACTANT; PROPANE; DEHYDROGENATION; HYDROCARBONS; REACTIVITY | ||
| Авторы |
|
||
| Организации |
|
Информация о финансировании (1)
| 1 | Российский фонд фундаментальных исследований | 10-03-00555 |
Реферат:
By using 13C solid-state NMR spectroscopy and GC-MS analysis, the activation of methane and coaromatization of methane and propane have been monitored on gallium-modified zeolite BEA at 573−823 K. A noticeable degree involvement of the 13C-label from methane-13C into the aromatic reaction products (benzene, toluene) has been demonstrated. The major intermediate of the methane activation represents gallium-methyl species, which are formed by methane dissociative adsorption on Ga2O3 species of the zeolite. The minor species of methane activation, Ga-methoxy groups, provide the involvement of methane into aromatics by the methylation of aromatic molecules, which are generated exclusively from propane, by the mechanism of electrophilic substitution. Ga-methyl species can serve as methylating nucleophilic agent for the reaction of nucleophilic substitution with participation of aromatic molecules, which contain the electron-withdrawing substitutes.
Библиографическая ссылка:
Luzgin M.V.
, Gabrienko A.A.
, Rogov V.A.
, Toktarev A.V.
, Parmon V.N.
, Stepanov A.G.
The "Alkyl" and "Carbenium" Pathways of Methane Activation on Ga-Modified Zeolite BEA: 13C Solid-State NMR and GC-MS Study of Methane Aromatization in the Presence of Higher Alkane
The Journal of Physical Chemistry C. 2010. V.114. N49. P.21555-21561. DOI: 10.1021/jp1078899 WOS Scopus РИНЦ CAPlusCA OpenAlex
The "Alkyl" and "Carbenium" Pathways of Methane Activation on Ga-Modified Zeolite BEA: 13C Solid-State NMR and GC-MS Study of Methane Aromatization in the Presence of Higher Alkane
The Journal of Physical Chemistry C. 2010. V.114. N49. P.21555-21561. DOI: 10.1021/jp1078899 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 20 авг. 2010 г. |
| Принята к публикации: | 27 окт. 2010 г. |
| Опубликована online: | 11 нояб. 2010 г. |
| Опубликована в печати: | 16 дек. 2010 г. |
Идентификаторы БД:
| Web of science: | WOS:000284990800091 |
| Scopus: | 2-s2.0-78650281081 |
| РИНЦ: | 16705776 |
| Chemical Abstracts: | 2010:1401196 |
| Chemical Abstracts (print): | 154:10400 |
| OpenAlex: | W2318053400 |