EVIDENCE FOR A PARTICIPATION OF ZEOLITE ACID SITES IN THE COKE REMOVAL THROUGH OXIDATIVE TREATMENT

Authors
MOLJORD K MAGNOUX P GUISNET M
Citation
K. Moljord et al., EVIDENCE FOR A PARTICIPATION OF ZEOLITE ACID SITES IN THE COKE REMOVAL THROUGH OXIDATIVE TREATMENT, Catalysis letters, 25(1-2), 1994, pp. 141-147
Citations number
20
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
25
Issue
1-2
Year of publication
1994
Pages
141 - 147
Database
ISI
SICI code
1011-372X(1994)25:1-2<141:EFAPOZ>2.0.ZU;2-S
Abstract
Coke removal by oxidative treatment was investigated for a number of H Y zeolites with framework Si/Al ratios of 4-100, coked at different le vels (from 2 to 20 wt%) during propene transformation at 450-degrees-C . A strong influence of the density of framework aluminium atoms hence of the density of the acid sites was found. On the other hand the con tent of the zeolite in extraframework aluminium species as well as the composition of coke were of minor importance for coke removal. A mech anism involving radical carbocations as intermediates is proposed.