A temporal analysis of products study of the mechanism of VOC catalytic oxidation using uranium oxide catalysts

A temporal analysis of products (TAP) reactor is used to investigate the mechanism of oxidation of volatile organic compounds by uranium oxide catalysts. Continuous flow studies indicated that butane, benzene and chlorobutane VOCs were oxidised to carbon oxides and no partially oxidised products wer...

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Bibliographic Details
Published in:Catalysis today 1999-11, Vol.54 (1), p.3-12
Main Authors: Heneghan, Catherine S, Hutchings, Graham J, O’Leary, Shane R, Taylor, Stuart H, Boyd, Vicki J, Hudson, Ian D
Format: Article
Language:English
Subjects:
Catalysis
Catalytic oxidation
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
TAP reactor
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Uranium oxides
VOC
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Summary:A temporal analysis of products (TAP) reactor is used to investigate the mechanism of oxidation of volatile organic compounds by uranium oxide catalysts. Continuous flow studies indicated that butane, benzene and chlorobutane VOCs were oxidised to carbon oxides and no partially oxidised products were observed. A combination of TAP pulse experiments with oxygen present and absent in the gas phase has indicated that the lattice oxygen from the catalyst is responsible for the total oxidation activity. This has been confirmed by studies using isotopically labelled oxygen. It is proposed that the catalysts operates by a redox mechanism utilising lattice oxygen and the high activity shown by U 3O 8 is due to the facile uranium redox couple and the non-stoichiometric nature of the oxide.
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(99)00162-5