Sulfur K-edge X-ray absorption spectroscopy of petroleum asphaltenes and model compounds

Journal Article · Wed Apr 26 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00191a012· OSTI ID:5108756

George, G N; Gorbaty, M L ^[1]

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1. Exxon Research and Engineering Co., Annandale, NJ (USA)

The utility of sulfur K-edge X-ray absorption spectroscopy for the determination and quantification of sulfur forms in petroleum asphaltenes has been investigated. Both X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra were obtained for a selected group of model compounds and for several petroleum asphaltene samples. For the model compounds the sulfur XANES was found to vary widely from compound to compound and to provide a fingerprint for the form of sulfur involved. The use of third derivatives of the spectra enabled discrimination of mixtures of sulfidic and thiophenic model compounds and allowed approximate quantification of the amount of each component in the mixtures and in the asphaltene samples. These results represent the first demonstration that nonvolatile sulfur forms can be distinguished and approximately quantified by direct measurement.

• DOE Contract Number: AC03-82ER13000
• OSTI ID: 5108756
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:9; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
ABSORPTION
ABSORPTION SPECTROSCOPY
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL ANALYSIS
DATA
ELECTROMAGNETIC RADIATION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
IONIZING RADIATIONS
K ABSORPTION
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
SPECTROSCOPY
SULFUR COMPOUNDS
TAR
X RADIATION