Title: Solid-state ion exchange in beta zeolites. II
Abstract: The solid-state interaction between NH4Cl and Na-, Cs- and H-β zeolites was followed using temperature-programmed evolution/mass spectrometry (TPE/MS) and thermal analysis (TA) of 1-propylamine (1-PA) desorption for proton acidity determinations. The guest salt NH4Cl undergoes a decomposition to NH3 and HCl upon grinding and subsequent heating of the mixture with alkaline-beta zeolites, and an exchange reaction occurs with the cations of the host zeolite. The degree of exchange was found to depend on the guest/host ion concentration and the temperature. During this solid-state interaction a non-volatile alkaline-chloride salt is formed, which participates in a reverse reaction, depending on the temperature. A study of these systems permitted some peculiarities of the re-exchange process to be examined.
Publication Year: 1998
Publication Date: 1998-10-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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