Results 201 to 210 of about 18,595 (261)
Individual Microfossil δ<sup>13</sup>C Shows That δ<sup>13</sup>C<sub>org</sub> Excursions in the Neoproterozoic Chuar Group Do Not Reflect the Exogenic Carbon Cycle. [PDF]
GeobiologyAgić H +4 more
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
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 ...
Colin Bousige +2 more
exaly +4 more sources
Kerogen origin, evolution and structure
Organic Geochemistry, 2007Kerogen, commonly defined as the insoluble macromolecular organic matter (OM) dispersed in sedimentary rocks, is by far the most abundant form of OM on Earth. This fossil material is of prime importance as the source of oil and natural gas; moreover, kerogen can provide essential information on major topics such as past environments, climates and biota.
Vandenbroucke, M., Largeau, C.
exaly +3 more sources
2006
[Extract] Kerogen is the solid, high molecular-weight fraction of sedimentary organic matter (OM) that is insoluble in organic solvents (e.g. chloroform) as oppoosed to the soluble fraction called bitumen. Kerogen is a macromolecule of condensed cyclic nuclei linked by heteroatomic bonds or aliphatic chains.
Wüst, Raphael A.J., Bustin, R Marc
+5 more sources
[Extract] Kerogen is the solid, high molecular-weight fraction of sedimentary organic matter (OM) that is insoluble in organic solvents (e.g. chloroform) as oppoosed to the soluble fraction called bitumen. Kerogen is a macromolecule of condensed cyclic nuclei linked by heteroatomic bonds or aliphatic chains.
Wüst, Raphael A.J., Bustin, R Marc
+5 more sources
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
openaire +1 more source
Kerogen Chemistry 9. Removal of Kerogen Radicals and Their Role in Kerogen Anhydride Decomposition
Energy & Fuels, 2006By treatment with CrCl2, the radical populations of Kimmeridge and Bakken kerogens were significantly decreased. When both kerogens are mildly heated, anhydride formation at low temperatures can be detected by infrared spectroscopy only when radicals have been removed by CrCl2 treatment.
John W. Larsen +3 more
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source
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
openaire +1 more source