Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 147, Issue 4, Pages 3483-3494Publisher
SPRINGER
DOI: 10.1007/s10973-021-10699-1
Keywords
Congo oil shale; Type I kerogen; Solid-state C-13 NMR; Thermal processes
Funding
- Mohammed V University in Rabat, Morocco
- Hassan II Academy of Sciences and Techniques, Morocco
Ask authors/readers for more resources
The study characterized kerogen-rich oil shale from Central Kongo (CK) in the Democratic Republic of the Congo using various methods, indicating low maturity type I kerogen predominated by aliphatic carbons with marine origin.
Oil produced from the organic matter-rich sedimentary rocks pyrolysis processes represents one of the most promising and available unconventional fossil fuel reserves that can fill the energy deficit in the near future. In the present study, the kerogen-rich oil shale originated from the Central Kongo (CK) in Democratic Republic of the Congo was subject of numerous characterization studies, such as C-13 cross polarization/magic angle spinning nuclear magnetic resonance (C-13 CP/MAS NMR), simultaneous thermogravimetry/differential thermal analysis (TG/DTA) and fast pyrolysis combined with gas chromatography/mass spectrometry (Py-GC/MS). C-13 NMR results indicate that the kerogen carbon skeleton is mainly of aliphatics with methylene chains, in agreement with the molar ratio H/C of 1.71. The predominance of aliphatics over aromatics is indicative of an immature type I kerogen. In addition, thermal analysis revealed a single and narrow pyrolysis process of kerogen at temperature below 456 degrees C, reflecting the immature type I kerogen in CK oil shale. The results of fast Py-GC/MS show that the studied sample is primarily of aliphatic carbons (n-alkane/n-alkene) and formed of short methylene chains with maximum carbon distribution at C15. The minor components of C20 + suggested marine origin of kerogen with an anoxic reductive environment during the diagenesis of the source rock.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available