Thermal analysis of adsorbed propanamines for the characterization of Ga-MFI zeolites

Gallium-containing forms of MFI zeolite have been subjected to adsorption of 1- and 2-propanamine, and the results of subsequent thermal treatment have been analyzed and compared to literature reports for propanamines adsorbed on proton forms of MFI. Zeolitic gallium cations show completely differen...

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Bibliographic Details
Published in:Journal of catalysis 1994-03, Vol.146 (1), p.228-236
Main Authors: Kanazirev, Vladislav, Dooley, Kerry M., Price, Geoffrey L.
Format: Article
Language:English
Subjects:
AMINES
GALLIUM COMPOUNDS
INORGANIC ION EXCHANGERS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
SILICATE MINERALS
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES 400201 > Chemical & Physicochemical Properties
THERMAL ANALYSIS
ZEOLITES
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Summary:Gallium-containing forms of MFI zeolite have been subjected to adsorption of 1- and 2-propanamine, and the results of subsequent thermal treatment have been analyzed and compared to literature reports for propanamines adsorbed on proton forms of MFI. Zeolitic gallium cations show completely different behavior from zeolitic protons, including a propanamine decomposition mechanism which is different from Hofmann elimination. In this mechanism NH3 is desorbed at temperatures as much as 160 K below that of H-MFI. Major differences in the decomposition chemistry of the two amines were also observed when Ga cations were present.
ISSN:0021-9517
1090-2694
DOI:10.1016/0021-9517(94)90026-4