Microanalysis of barkinite from Chinese coals of high volatile bituminous rank

Maria Mastalerz, James C. Hower, Yanyan Chen

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

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 languageEnglish
Pages (from-to)103-108
Number of pages6
JournalInternational Journal of Coal Geology
Volume141-142
DOIs
StatePublished - 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

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