TRANSIENT-BEHAVIOR OF CU-OVEREXCHANGED ZSM-5 CATALYST IN NO DECOMPOSITION

Authors
PIRONE R GARUFI E CIAMBELLI P MORETTI G RUSSO G
Citation
R. Pirone et al., TRANSIENT-BEHAVIOR OF CU-OVEREXCHANGED ZSM-5 CATALYST IN NO DECOMPOSITION, Catalysis letters, 43(3-4), 1997, pp. 255-259
Citations number
37
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
43
Issue
3-4
Year of publication
1997
Pages
255 - 259
Database
ISI
SICI code
1011-372X(1997)43:3-4<255:TOCZCI>2.0.ZU;2-T
Abstract
The adsorption of NO at 80 degrees C on Cu-overexchanged ZSM-5 (Si/Al = 80) has been investigated in a flow apparatus. The formation of N2O during a transient phase was observed after He pretreatment of the zeo lite at 550 degrees C. A negligible amount of N2O was detected, in con trast, from Oz pretreated zeolite. The formation of N2O has been assoc iated to the reoxidation from Cu+ to Cu2+ Of a fraction (about 40%) of copper in the zeolite. The redox chemistry in NO adsorption at low te mperature can be related to the activity of Cu-ZSM-5 zeolite in NO dec omposition.