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

doi:10.3390/min12080975

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 journal › Article › peer-review

13 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 language	English
Article number	975
Journal	Minerals
Volume	12
Issue number	8
DOIs	https://doi.org/10.3390/min12080975
State	Published - Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 by the authors.

Funding

Portions of this study were completed as part of U.S. Department of Energy contracts DE-FE0026952, DE-FE0027167, and DE-FE0032053 and were further supported by National Science Foundation grant CBET-1510861 to the University of Kentucky. Access to characterization instruments and staff assistance was provided by the Electron Microscopy Center at the University of Kentucky, supported in part by the National Science Foundation/EPSCoR Award No. 1355438 and by the Commonwealth of Kentucky. This work used shared facilities at the Virginia Tech National Center for Earth and Environmental Nanotechnology Infrastructure (NanoEarth), a member of the National Nanotechnology Coordinated Infrastructure (NNCI), supported by NSF (ECCS 1542100 and ECCS 2025151).

Funders	Funder number
University of Kentucky
U.S. Department of Energy Chinese Academy of Sciences Guangzhou Municipal Science and Technology Project Oak Ridge National Laboratory Extreme Science and Engineering Discovery Environment National Science Foundation National Energy Research Scientific Computing Center National Natural Science Foundation of China	1510861, ECCS 1542100, ECCS 2025151
U.S. Department of Energy Oak Ridge National Laboratory U.S. Department of Energy National Science Foundation National Energy Research Scientific Computing Center	DE-FE0027167, DE-FE0026952, DE-FE0032053
Office of Experimental Program to Stimulate Competitive Research	1355438

Keywords

calcium
class C fly ash
lanthanides
subbituminous coal

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology
Geology

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10.3390/min12080975

Cite this

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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.",

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AU - Hower, James C.

AU - Berti, Debora

AU - Winkler, Christopher R.

AU - Qian, Dali

AU - Briot, Nicolas J.

PY - 2022/8

Y1 - 2022/8

N2 - 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.

AB - 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.

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KW - class C fly ash

KW - lanthanides

KW - subbituminous coal

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

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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