Biological markers in petroleum asphaltenes and coals: Possible mode of incorporation

Conference · Wed Mar 01 00:00:00 EST 1989 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:6821794

Trifilieff, S; Blanc, P; Sieskind, O; Albrecht, P ^[1]

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1. Universite Louis Pasteur, Strasbourg (France)

n-Heptane precipitated asphaltenes from several crude oils and several pre-extracted coals of varying ranks were treated by ruthenium tetroxide which is known to selectively oxidize aromatic rings. A study of the branched and cyclic acids formed during this procedure showed that acyclic isoprenoid acids occurred in all asphaltenes and culminated at C{sub 21}, whereas hopanoic acids usually extended up to C{sub 36}. Steroid acids (C{sub 28}-C{sub 30}) were particularly abundant in the asphaltenes of Rozel Point seep oil and were identified by synthesis. They bear one additional carbon as compared with the steranes of the oil. Hopanoic acids and traces of steroid acids were also detected in the oxidation products of the less mature coals. Evidence from the carbon number distribution of the different families indicated that these molecules could at least partially be incorporated into high molecular weight entities via Friedel-Crafts type reactions. Simulation experiments carried out with pure standards confirmed this hypothesis.

• OSTI ID: 6821794
• Report Number(s): CONF-8904126-; CODEN: ACPCA
• Journal Information: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA), Vol. 34:1; Conference: Biomarkers in petroleum: memorial symposium for Wolfgang K. Seifert, Dallas, TX (USA), 9-14 Apr 1989; ISSN 0569-3799
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
01 COAL, LIGNITE, AND PEAT
58 GEOSCIENCES
COAL
ASPHALTENES
PETROLEUM
AROMATICS
GEOCHEMISTRY
HEPTANE
ORGANIC ACIDS
OXIDATION
SIMULATION
ALKANES
ASPHALTS
BITUMENS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMISTRY
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MATERIALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
020200* - Petroleum- Reserves
Geology
& Exploration
011000 - Coal
Lignite
& Peat- Reserves
Geology
& Exploration
580000 - Geosciences