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AlNaZSM-5 zeolites. Part 2. A study with i.r. spectra of adsorbed CO

✍ Scribed by T. Romotowski; J. Komorek; Ye.A. Paukshtis; E.N. Yurchenko

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
463 KB
Volume
11
Category
Article
ISSN
0144-2449

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✦ Synopsis

Properties of acid centers in AINaZSM-5 zeolites were studied by recording low-temperature i.r. spectra of adsorbed CO. Only a small amount of sodium in NaZSM-5 zeolite can be exchanged for aluminum cations. The majority of inserted aluminum cations occurs in the form of an "aluminum oxide/ hydroxide" phase because the content of nonskeletal A13+ is very low.

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AINaZSM-5 zeolites. Part 1. A study with
AINaZSM-5 zeolites. Part 1. A study with i.r. spectroscopy and MAS n.m.r. (27Al and 1H)
✍ T. Romotowski; J. Komorek; V.M. Mastikhin; A.V. Nosov πŸ“‚ Article πŸ“… 1991 πŸ› Elsevier Science 🌐 English βš– 510 KB

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 wit