Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9610595 | Catalysis Today | 2005 | 10 Pages |
Abstract
The peculiar electrophilic behaviour of active oxygen formed over Fe-ZSM-5 zeolites upon nitrous oxide decomposition has been investigated in toluene oxidation. Fe-ZSM-5 catalysts have been produced by hydrothermal and post-synthetic techniques, with particular attention given to preparation by chemical vapour deposition of anhydrous FeCl3 into H-ZSM-5. Higher yields of hydroxylated product are possible over Fe-zeolites prepared by hydrothermal synthesis, with para-cresol being the predominant oxygenate formed, though the formation of tars and polycondensed aromatic hydrocarbons retards catalytic activity over time. Oxidation of para-xylene, isopropylbenzene, benzaldehyde, chlorobenzene and phenol demonstrate that the oxidative competition between aliphatic and aromatic CH bonds is influenced considerably by the steric and electronic nature of the substituent groups.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
A. Costine, T. O'Sullivan, B.K. Hodnett,