| Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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|---|---|---|
| Page(s) | C2-809 - C2-810 | |
| DOI | https://doi.org/10.1051/jp4:1997241 | |
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
J. Phys. IV France 7 (1997) C2-809-C2-810
DOI: 10.1051/jp4:1997241
1 Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
2 Exploration Direction, Elf Aquitaine, CSTJF, 64018 Pau cedex, France
© EDP Sciences 1997
J. Phys. IV France 7 (1997) C2-809-C2-810
DOI: 10.1051/jp4:1997241
The Chemical Nature of Oxidized Sulphur in Asphaltenes from X-Ray Absorption Spectroscopy
M. Kasrai1, G.M. Bancroft1, R. Brunner1 and J. Connan21 Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
2 Exploration Direction, Elf Aquitaine, CSTJF, 64018 Pau cedex, France
Abstract
Bitumen samples have been chosen either from natural oil seepages and outcropping oil-stained reservoirs or archaeological bitumens from excavations in Iraq and Pakistan. Asphaltenes have been extracted from the bitumens. X-ray absorption near edge fine structure (XANES) spectroscopy at the S L-edge and K-edge has been employed to follow the oxidation effects on various sulphur moieties of the asphaltene fractions. Among asphaltenes extracted from archeological bitumens, sulphoxide, sulphone and sulphate are the predominant oxidized forms of sulphur.
© EDP Sciences 1997