25th International Meeting on Organic Geochemistry IMOG 2011

P-279
Characterization of biomarkers occluded inside oil and coal
asphaltenes
Ksenija Stojanoviš 1 , Nikola Vukoviš 2 , Vladimira Hrepiš 1 , Aleksandra Ńajnoviš 3 , Dragana
Ņivotiš 4 , Branimir Jovanţiševiš 1
1 University of Belgrade, Faculty of Chemistry, 11000 Belgrade, Serbia, 2 University of Belgrade, Innovation
Center of the Faculty of Chemistry, 11000 Belgrade, Serbia, 3 Center of Chemistry, IChTM, 11000 Belgrade,
Serbia, 4 University of Belgrade, Faculty of Mining and Geology, 11000 Belgrade, Serbia (corresponding
author:xenasyu@yahoo.com)
Maltenes occluded inside asphaltene structures are of
the great importance in organic-geochemical studies
of biodegraded crude oils [1, 2]. In this work, occluded
maltenes have been released from asphaltene
aggregates using three methods: a) mild pyrolysis of
asphaltenes at 250°C, during 4h in inert atmosphere
of nitrogen; b) mild oxidation of asphaltenes using
H2O2/CH3COOH reagent and c) mild oxidation of
asphaltenes using NaIO4/NaH2PO4 reagent [1].
Asphaltenes isolated from a non-biodegraded crude
oil of mixed terrestrial-marine origin and from bitumen
of a humic bituminous coal were used as substrates.
Maltenes from oil, from coal bitumen and those
released from asphaltenes were separated into
saturated, aromatic and NSO fractions. Saturated
hydrocarbons were analyzed using GC-MS.
Occluded maltenes yields, relative to initial mass of oil
or coal asphaltenes, were relatively low in all the
experiments (