High-Resolution Transmission Electron Microscopy Study of a Powder River Basin Coal-Derived Fly Ash

James C. Hower, Debora Berti, Christopher R. Winkler, Dali Qian, Nicolas J. Briot

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Examination of a fly ash derived from the combustion of a low-S, subbituminous Powder River Basin coal by Scanning Electron Microscopy (SEM) and High-resolution Transmission Electron Microscopy (HRTEM), both supplemented by Energy-dispersive X-ray spectroscopy (EDS), showed that the fly ashes were dominated by amorphous phases, Ca-rich plagioclase feldspars, Mg-rich phases, complex Ca-Mg-Al-Si-Ti-Fe grains, and trace amounts of REE-rich particles. Many of the particles were rimmed by a Ca-S, possibly a sulfate. HRTEM-EDS examination of a REE-rich particle proved it to be a mix of light- and heavy-rare earth minerals mixed with amorphous phases.

Original languageEnglish
Article number975
JournalMinerals
Volume12
Issue number8
DOIs
StatePublished - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 by the authors.

Keywords

  • calcium
  • class C fly ash
  • lanthanides
  • subbituminous coal

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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