Abstract
Permian high volatile bituminous barkinite-rich coal from China has been evaluated petrographically and analyzed by electron microprobe and micro-FTIR techniques. The analyzed samples varied in vitrinite reflectance from 0.65% to 0.73%, and the corresponding reflectance of barkinite ranged from 0.19% to 0.23%. Compared to the associated vitrinite, barkinite had a higher carbon and lower oxygen content in all samples. It had stronger aliphatic CHx absorbance at 2800-3000 and 1450-1460 cm-1 and less intense both aromatic C=C ring stretching vibration at ~1600 cm-1 and aromatic CHx out-of-plane deformation at 700-900 cm-1. Micro-FTIR revealed large variations in the aliphatic group intensities within barkinite, suggesting its varying oil generation potential. Air oxidation of barkinite over a 6-month period resulted in rapid consumption of aliphatic groups and the formation of oxygenated functional groups.
Original language | English |
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Pages (from-to) | 103-108 |
Number of pages | 6 |
Journal | International Journal of Coal Geology |
Volume | 141-142 |
DOIs | |
State | Published - Mar 1 2015 |
Bibliographical note
Publisher Copyright:© 2015 Elsevier B.V.
Keywords
- Barkinite
- Coal
- FTIR
- Vitrinite
ASJC Scopus subject areas
- Fuel Technology
- Geology
- Economic Geology
- Stratigraphy