Microanalysis of barkinite from Chinese coals of high volatile bituminous rank

Maria Mastalerz, James C. Hower, Yanyan Chen

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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 languageEnglish
Pages (from-to)103-108
Number of pages6
JournalInternational Journal of Coal Geology
StatePublished - Mar 1 2015

Bibliographical note

Funding Information:
Financial support from the China Scholarship Council (CSC) for Y. C. is gratefully acknowledged. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0006978 (formerly DE-FG02-11ER16246 ). We thank J.A. Curiale, one Anonymous Reviewer and the Editor for valuable comments.

Publisher Copyright:
© 2015 Elsevier B.V.


  • Barkinite
  • Coal
  • FTIR
  • Vitrinite

ASJC Scopus subject areas

  • Fuel Technology
  • Geology
  • Economic Geology
  • Stratigraphy


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