Molecular characterization and fingerprinting of vanadyl porphyrin and non-porphyrin compounds in the asphaltenes of heavy crude petroleums using HPLC-GFAA analysis
High performance liquid chromatography coupled with graphite furnace atomic absorption (HPLC-GFAA) analysis were used to study the precipitated asphaltene fraction of four heavy crude petroleums. Prudhoe Bay and Wilmington crude oils from Alaska and California, respectively, have low vanadium and asphaltene concentrations. Boscan and Cerro Negro are Venezuelan crudes with high levels of vanadium and asphaltenes. The emphasis of this study is the molecular characterization of classes of vanadyl compounds, with special emphasis placed on differentiating the locations of non-porphyrin and porphyrin compounds in the HPLC-GFAA analyses of the asphaltenes and their solvent extracts. Steric exclusion chromatography (SEC) columns were used to determine the molecular weight distribution of vanadium in the asphaltenes and extracts. Fingerprints obtained from SEC-HPLC-GFAA analysis of asphaltenes or normal and reverse phase HPLC-GFAA analysis of polar extracts provided information on the composition of the asphaltines. 122 references, 27 figures, 7 tables.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5458061
- Report Number(s):
- LBL-16867; ON: DE84004967
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Thesis. Submitted by B.K. Wines
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ASPHALTENES
CHEMICAL ANALYSIS
SOLVENT EXTRACTION
PETROLEUM
PORPHYRINS
ABSORPTION SPECTROSCOPY
LIQUID COLUMN CHROMATOGRAPHY
STRUCTURAL CHEMICAL ANALYSIS
VANADIUM COMPOUNDS
CORRELATIONS
EXPERIMENTAL DATA
MOLECULAR WEIGHT
ORGANOMETALLIC COMPOUNDS
ASPHALTS
BITUMENS
CARBOXYLIC ACIDS
CHROMATOGRAPHY
DATA
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
SEPARATION PROCESSES
SPECTROSCOPY
TAR
TRANSITION ELEMENT COMPOUNDS
023000* - Petroleum- Properties & Composition
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)