Surface chemical behavior of triuranium octaoxide in the atmospheres of carbon monoxide and hydrogen

The surface chemical behavior of U 3O 8 has been studied by X-ray photoelectron spectroscopy (XPS), gas chromatography (GC) and thermodynamic calculations in reducing atmospheres. The surface of U 3O 8 is remarkably reduced in the atmospheres of CO and H 2. The effect of the oxide reduction is more...

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Bibliographic Details
Published in:Journal of nuclear materials 1998-12, Vol.257 (3), p.287-294
Main Authors: Wang, Xiaolin, Fu, Yibei, Xie, Renshou
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Installations for energy generation and conversion: thermal and electrical energy
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Summary:The surface chemical behavior of U 3O 8 has been studied by X-ray photoelectron spectroscopy (XPS), gas chromatography (GC) and thermodynamic calculations in reducing atmospheres. The surface of U 3O 8 is remarkably reduced in the atmospheres of CO and H 2. The effect of the oxide reduction is more obvious at higher temperatures and the oxygen content in the oxide is decreased with increasing exposure to the gases. The influence of H 2 is less than that of CO. It is also shown that the oxide surface layer is resistant to further hydriding as there does not exist any hydriding reaction for U 3O 8 in a H 2 atmosphere. Results of GC investigations and thermodynamic calculations are in good agreement with the above conclusions.
ISSN:0022-3115
1873-4820
DOI:10.1016/S0022-3115(98)00453-X