Acidity of Modified Y Zeolites: Effect of Nonskeletal Al, Formed by Hydrothermal Treatment, Dealumination with SiCl4, and Cationic Exchange with Al Full article
Journal |
Zeolites
ISSN: 0144-2449 |
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Output data | Year: 1989, Volume: 9, Number: 1, Pages: 12-17 Pages count : 6 DOI: 10.1016/0144-2449(89)90003-1 | ||||||
Tags | acidity, Al electron-acceptors, Modified Y zeolites, OH groups | ||||||
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Abstract:
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.
Cite:
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
Dates:
Submitted: | Feb 15, 1988 |
Accepted: | Mar 17, 1988 |
Published print: | Jan 1, 1989 |
Published online: | Aug 25, 2004 |
Identifiers:
Web of science | WOS:A1989R602800002 |
Scopus | 2-s2.0-0024303641 |
Elibrary | 31122775 |
Chemical Abstracts | 1989:102353 |
Chemical Abstracts (print) | 110:102353 |
OpenAlex | W1997627430 |