Acidity of Modified Y Zeolites: Effect of Nonskeletal Al, Formed by Hydrothermal Treatment, Dealumination with SiCl4, and Cationic Exchange with Al Научная публикация
Журнал |
Zeolites
ISSN: 0144-2449 |
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Вых. Данные | Год: 1989, Том: 9, Номер: 1, Страницы: 12-17 Страниц : 6 DOI: 10.1016/0144-2449(89)90003-1 | ||||||
Ключевые слова | acidity, Al electron-acceptors, Modified Y zeolites, OH groups | ||||||
Авторы |
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Организации |
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Реферат:
The acidity of modified Y zeolites was studied using adsorption and thermal desorption of pyridine (i.r.s. technique). It was found that at least some nonskeletal Al species always take part in the compensation of lattice charge, thus affecting the number of skeletal hydroxyls. Oxidic clusters prevailing on hydrothermally treated zeolites yield a much lower fraction of strong Al electron-accepting sites than of cationic species, which are typical for AIHY and are also formed in a considerable amount in zeolites dealuminated with SiCl4. Both types of nonskeletal Al species decrease the Brönsted acid strength of the zeolite. The activity of modified zeolites in the oligomerization of ethylene is discussed taking into account the action of Al electron-accepting sites.
Библиографическая ссылка:
Kubelková L.
, Beran S.
, Malecka A.
, Mastikhin V.M.
Acidity of Modified Y Zeolites: Effect of Nonskeletal Al, Formed by Hydrothermal Treatment, Dealumination with SiCl4, and Cationic Exchange with Al
Zeolites. 1989. V.9. N1. P.12-17. DOI: 10.1016/0144-2449(89)90003-1 WOS Scopus РИНЦ
Acidity of Modified Y Zeolites: Effect of Nonskeletal Al, Formed by Hydrothermal Treatment, Dealumination with SiCl4, and Cationic Exchange with Al
Zeolites. 1989. V.9. N1. P.12-17. DOI: 10.1016/0144-2449(89)90003-1 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 15 февр. 1988 г. |
Принята к публикации: | 17 мар. 1988 г. |
Опубликована в печати: | 1 янв. 1989 г. |
Опубликована online: | 25 авг. 2004 г. |
Идентификаторы БД:
Web of science | WOS:A1989R602800002 |
Scopus | 2-s2.0-0024303641 |
РИНЦ | 31122775 |
Chemical Abstracts | 1989:102353 |
Chemical Abstracts (print) | 110:102353 |
OpenAlex | W1997627430 |