AINaZSM-5 zeolites. Part 1. A study with i.r. spectroscopy and MAS n.m.r. (27Al and 1H) Научная публикация
Журнал |
Zeolites
ISSN: 0144-2449 |
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Вых. Данные | Год: 1991, Том: 11, Номер: 5, Страницы: 491-496 Страниц : 6 DOI: 10.1016/S0144-2449(05)80123-X | ||||
Ключевые слова | 27Al and 1H MAS n.m.r, AlNaZSM-5 zeolites, i.r. spectra, propene and methanol transformation | ||||
Авторы |
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Организации |
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Реферат:
The direct treatment of NaZSM-5 zeolite with aluminum salt solution without an intermediate ammonium form was applied to obtain as neutral AINaZSM-5 zeolites as possible. It was possible to prepare very weakly acidic, or almost neutral samples, using the parent zeolite neutralized by an exchange with NaCl solution prior to the treatment with AlCl3 solution in the presence of an acetate buffer. As a test reaction, transformation of propene and methanol were performed. 27Al and 1H n.m.r. studies confirmed that the preparation of aproton forms of AlNaZSM-5 zeolites is difficult, because AlCl3 solution treatment is normally accompanied by the exchange of Na ions for protons. Most of the aluminum atoms inserted exist in the zeolite channels as various forms of “aluminum oxide/ hydroxide” complexes. Aluminum occurs in strongly distorted tetrahedral or octahedral surroundings, and the quantity of Al as hexa-aqua-complexes is small and is independent from the concentration of Al.
Библиографическая ссылка:
Romotowski T.
, Komorek J.
, Mastikhin V.M.
, Nosov A.V.
AINaZSM-5 zeolites. Part 1. A study with i.r. spectroscopy and MAS n.m.r. (27Al and 1H)
Zeolites. 1991. V.11. N5. P.491-496. DOI: 10.1016/S0144-2449(05)80123-X WOS Scopus РИНЦ
AINaZSM-5 zeolites. Part 1. A study with i.r. spectroscopy and MAS n.m.r. (27Al and 1H)
Zeolites. 1991. V.11. N5. P.491-496. DOI: 10.1016/S0144-2449(05)80123-X WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 2 нояб. 1989 г. |
Принята к публикации: | 17 дек. 1990 г. |
Опубликована в печати: | 1 июн. 1991 г. |
Опубликована online: | 7 мар. 2005 г. |
Идентификаторы БД:
Web of science | WOS:A1991FU80900013 |
Scopus | 2-s2.0-0026173150 |
РИНЦ | 31091174 |
Chemical Abstracts | 1991:479685 |
Chemical Abstracts (print) | 115:79685 |
OpenAlex | W2072660237 |