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129Xe-NMR study of coke distribution in dealuminated HY zeolites (1990)

Barrage, M. C. ; Bonardet, J. L. ; Fraissard, J.

Springer

Catalysis letters 5 (1990), S. 143-154

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ISSN: 1572-879X

Keywords: NMR ; xenon ; coke ; zeolite ; extra-framework aluminium

Source: Springer Online Journal Archives 1860-2000

Topics: Chemistry and Pharmacology

Notes: Abstract Zeolites coking has been studied by129Xe-NMR technique. The distribution of the coke is heterogeneous on the supercage surface at low cokage level. When coking increases up to 10% the supercages are lined with coke and the residual internal volume consists of narrow channels. Beyond 10% the coke also affects the external surface of the zeolites, with the formation of coke microcavities between the crystallites. This technique has also enabled us to show the role of extra-framework Al in the cracking activity of zeolites.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00763946

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