IR Study of Adsorption of Olefins on Deuterated ZSM-5

IR Study of Adsorption of Olefins on Deuterated ZSM-5

Adsorption dynamics of linear olefins (C2−C4) on D-ZSM-5 with no Lewis acid sites was examined below 180 K by IR spectroscopy. Below 170 K, olefins except ethene adsorbed on Brønsted acid sites (BAS) by very weak hydrogen-bonding with their alkyl groups, which were then released and migrated on the...

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Veröffentlicht in:The journal of physical chemistry. B 1998-03, Vol.102 (12), p.2259-2262
Hauptverfasser: Kondo, Junko N, Wakabayashi, Fumitaka, Domen, Kazunari
Format: Artikel
Sprache:eng
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Zusammenfassung:Adsorption dynamics of linear olefins (C2−C4) on D-ZSM-5 with no Lewis acid sites was examined below 180 K by IR spectroscopy. Below 170 K, olefins except ethene adsorbed on Brønsted acid sites (BAS) by very weak hydrogen-bonding with their alkyl groups, which were then released and migrated on the wall of the zeolite cage without any specific adsorption sites by increasing the temperature. Further heating caused the conversion to strong hydrogen bonding of CC to BAS (π-complex), indicating that the formation of π-complexes is an activated process.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp9800416