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Kerogen Chemistry 4. Thermal Decarboxylation of Kerogens
Energy & Fuels, 2005Infrared spectra confirm that, when heated to 200 °C, Bakken kerogens form anhydrides from carboxylic acids. The anhydrides in turn thermally decompose at temperatures below 250 °C. The thermal production of CO, the absence of CO2, and the low temperature of the anhydride decomposition are all consistent with a radical chain mechanism initiated by a ...
Ryuichi Ashida +2 more
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Kerogen‐bound and free hopanoic acids in the messel oil shale kerogen
Chirality, 2001AbstractThe distribution of the free and bound hopanoic acids in both unheated and heated (350°C for 50 h) kerogens, isolated from the Messel oil shale, were analyzed by GC‐MS. The bound acids were released by subjecting the kerogen to three different treatments, namely, thermochemolysis in the presence of tetramethylammonium hydroxide (TMAH), as well ...
Abbott GD, Bashir FZ, Sugden MA
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Relationship of Kerogen and Sporopollenin–A Reply
Nature, 1970OUR suggestion1 that kerogen present in relatively unmetamorphosed Pre-Cambrian sediments was composed of sporopollenin was initiated by our analyses and the observations of others that the organic chemistry of such sediments appears relatively constant.
J, Brooks, G, Shaw
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Kerogen Chemistry 2. Low-Temperature Anhydride Formation in Kerogens
Energy & Fuels, 2004Bakken kerogens react rapidly when heated at temperatures of 40−180 °C to form carboxylic acid anhydrides and water from carboxylic acids. Differential scanning calorimetry (DSC) shows a pronounced irreversible endotherm over this temperature range, demonstrating the occurrence of an endothermic chemical reaction.
John W. Larsen +4 more
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Automated Kerogen Classification in Microscope Images of Dispersed Kerogen Preparation
Mathematical Geosciences, 2008We develop the classification part of a system that analyses transmitted light microscope images of dispersed kerogen preparation. The system automatically extracts kerogen pieces from the image and labels each piece as either inertinite or vitrinite. The image pre-processing analysis consists of background removal, identification of kerogen material ...
L. I. Kuncheva +5 more
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Realistic molecular model of kerogen’s nanostructure
Nature Materials, 2016Despite kerogen's importance as the organic backbone for hydrocarbon production from source rocks such as gas shale, the interplay between kerogen's chemistry, morphology and mechanics remains unexplored. As the environmental impact of shale gas rises, identifying functional relations between its geochemical, transport, elastic and fracture properties ...
Bousige, Colin +11 more
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Primary migration by diffusion through kerogen: II. Hydrocarbon diffusivities in kerogen
Geochimica et Cosmochimica Acta, 1990Abstract Laboratory experiments were performed to assess diffusion through kerogen as a mechanism of liquid hydrocarbon transport through fine-grained rocks. Such transport can be important in primary migration within source rocks and in leakage through seals. Previous work with organic-coated model cores has shown that hydrocarbon diffusion through
Michele Moisio Thomas, Jamie A. Clouse
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Chemical Composition of Shale Kerogen (Kerogen-70) from Leningrad Oblast
Russian Journal of Applied Chemistry, 2001The chemical composition of various extracts from oil shale (kerogen-70) was studied in detail.
V. V. Platonov +4 more
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Chemical modelling of kerogens
Organic Geochemistry, 1987Abstract Models of kerogens belonging to the three classical Types have been represented at the following evolution stages: • -beginning of diagenesis (sensu-stricto), • -beginning of catagenesis, • -end of catagenesis. Chemical models are drawn, using analytical data obtained on natural samples: elemental analysis, electron ...
F. Behar, M. Vandenbroucke
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Effect of the Kerogen Molecular Structure on the Formation of Methane During Kerogen Pyrolysis
Australian Journal of Chemistry, 2018In this study, density functional theory (DFT) at the GGA/RPBE level was employed to examine the effects of the kerogen microstructure on the formation mechanism of methane during the pyrolysis of kerogen. The calculations prove that the evolution of CH4 during kerogen pyrolysis corresponds to demethylation, and the process of forming methane involves ...
Qing Wang, Xinmin Wang, Shuo Pan
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