Testing of the Lewis Acidity of H-Y and HZSM-5 Zeolites with 15N n.m.r. of Adsorbed N2O Научная публикация
Журнал |
Zeolites
ISSN: 0144-2449 |
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Вых. Данные | Год: 1990, Том: 10, Номер: 6, Страницы: 593-597 Страниц : 5 DOI: 10.1016/S0144-2449(05)80318-5 | ||
Ключевые слова | 15N and 27Al n.m.r., adsorption, Lewis acidic sites, Y and ZSM-5 zeolites | ||
Авторы |
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Организации |
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Реферат:
The Lewis acidity of H-Y and HZSM-5 zeolites has been studied using 15N n.m.r. of adsorbed N2O. It follows from 15N n.m.r. data that in H-Y zeolites a variety of Lewis acidic sites having different strengths of acidity is present. The number of the strongest Lewis sites is about 20–30 μmole/g, i.e., about 102 times less compared with the total quantity of extralattice aluminum atoms. The number of the “strong” and “weak” Lewis sites in H-Y zeolites depends on the types of treatment. The strong Lewis sites are found in the samples treated under shallow-bed conditions. The deep-bed treatment results in decreasing of the concentration of the strongest Lewis acidic sites.
For HZSM-5 zeolites, the quantity of the strong Lewis acidic sites is the same order of magnitude as the number of the extralattice aluminum atoms.
Библиографическая ссылка:
Mastikhin V.M.
, Mudrakovsky I.L.
, Filimonova S.V.
Testing of the Lewis Acidity of H-Y and HZSM-5 Zeolites with 15N n.m.r. of Adsorbed N2O
Zeolites. 1990. V.10. N6. P.593-597. DOI: 10.1016/S0144-2449(05)80318-5 WOS Scopus РИНЦ
Testing of the Lewis Acidity of H-Y and HZSM-5 Zeolites with 15N n.m.r. of Adsorbed N2O
Zeolites. 1990. V.10. N6. P.593-597. DOI: 10.1016/S0144-2449(05)80318-5 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 5 июн. 1989 г. |
Принята к публикации: | 13 нояб. 1989 г. |
Опубликована в печати: | 1 июл. 1990 г. |
Опубликована online: | 12 окт. 2005 г. |
Идентификаторы БД:
Web of science | WOS:A1990DP37200013 |
Scopus | 2-s2.0-0025460064 |
РИНЦ | 31150774 |
Chemical Abstracts | 1990:504012 |
Chemical Abstracts (print) | 113:104012 |
OpenAlex | W2039310061 |