After asphaltene precipitation and fractionation by using column chromatography, saturated hydrocarbons were obtained by hexane flushing, then aromatic hydrocarbons by flushing with a mixture of dichloromethane and hexane (2:1, V/V).
For analyzing the saturated hydrocarbons fraction, the GC oven was initially set at 100[degrees]C for 5 min, programmed to 220[degrees]C at 4[degrees]C/min and then to 320[degrees]C at 2[degrees]C/min, with a final holding time of 25 min.
4, the sterides and terpenoids are very common in saturated hydrocarbon fractions.
The composition and distribution features of saturated hydrocarbon fractions show that sedimentation conditions of Dahuangshan oils shale were moderately saline, with the accumulation of zooplankton and phytoplankton.
4] source rock are distributed in the range of -26 to -27 [per thousand], the carbon isotopes of saturated hydrocarbons
are mostly around -28 [per thousand].
The reversibility implies that the synthesis of saturated hydrocarbons
is thermodynamically controlled and does not require organic matter.
Steam cracking is a key petrochemical technology used to convert saturated hydrocarbons
such as ethane, propane, naphtha blends or other feedstocks into olefins and aromatics, including ethylene, propylene, butadiene, benzene, and toluene.
Extracts were separated into saturated hydrocarbons, aromatic hydrocarbons and polar NSO fractions by column chromatography using a silica gel-alumina column after the precipitation of asphaltenes .
Partial gas chromatograms of the saturated hydrocarbons extracted from the sediments of Bilong Co samples are shown in Fig.
However, natural crude oil is mainly composed of saturated hydrocarbons
, whereas shale oil contains more organic heterocyclic compounds or unsaturated hydrocarbon compounds, which contain nitrogen, oxygen and so on.
(acyclic and cyclic ones) represent the main part of the identified compounds (fractions I and II).
One can suppose that decomposition of diethyl ether and ethanol both resulted in abundant formation of ethylene radicals which can stabilize reacting with active hydrogen from the same solvent decomposition and, in addition, with hydrogen from kerogen decomposition, forming ethane and other saturated hydrocarbons