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Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals

Publication ,  Journal Article
Hower, JC; Groppo, JG; Hsu-Kim, H; Taggart, RK
Published in: Fuel
April 1, 2021

This study examined rare earth element (REE) trends for Illinois Basin coal-sourced fly ashes, with the goal of understanding the elemental composition and resource potential for various fly ash fractions. Illinois Basin coals have a high volatile C through A bituminous rank with a moderate ash content (slightly>12% ash (dry basis)), about 3% sulfur, and, in general, lower concentrations of hazardous and other trace elements than many Central Appalachian coals. Fly ash from the combustion of Illinois Basin coals tends to have a high Fe2O3 content owing to the amount of pyrite in the feed coals. The rare earth element (REE) concentrations in Illinois Basin coal-sourced fly ashes are less than that for fly ashes from the combustion of Central Appalachian coals. The Upper continental crust-corrected fly ashes show an H-type enrichment, a positive EuN/EuN*, and, in some cases, a sharp Gd peak. For comparison, a suite of fly ashes from the combustion of a blend of eastern Kentucky coals had an H-type enrichment, a positive EuN/EuN*, but only a minimal Gd peak. In contrast, fly ash from the combustion of the Fire Clay coal, a REE-rich coal, had a negative EuN/EuN* and a sharp Gd peak. These results highlight the importance of feed coal composition on trace element contents of respective combustion fly ash fractions and also the unique REE enrichment patterns of the Illinois Basin fly ashes relative to the better studied fly ashes of eastern Kentucky and Central Appalachia.

Duke Scholars

Published In

Fuel

DOI

ISSN

0016-2361

Publication Date

April 1, 2021

Volume

289

Related Subject Headings

  • Energy
  • 4019 Resources engineering and extractive metallurgy
  • 4012 Fluid mechanics and thermal engineering
  • 4004 Chemical engineering
  • 0913 Mechanical Engineering
  • 0904 Chemical Engineering
  • 0306 Physical Chemistry (incl. Structural)
 

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Hower, J. C., Groppo, J. G., Hsu-Kim, H., & Taggart, R. K. (2021). Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals. Fuel, 289. https://doi.org/10.1016/j.fuel.2020.119990
Hower, J. C., J. G. Groppo, H. Hsu-Kim, and R. K. Taggart. “Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals.” Fuel 289 (April 1, 2021). https://doi.org/10.1016/j.fuel.2020.119990.
Hower JC, Groppo JG, Hsu-Kim H, Taggart RK. Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals. Fuel. 2021 Apr 1;289.
Hower, J. C., et al. “Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals.” Fuel, vol. 289, Apr. 2021. Scopus, doi:10.1016/j.fuel.2020.119990.
Hower JC, Groppo JG, Hsu-Kim H, Taggart RK. Distribution of rare earth elements in fly ash derived from the combustion of Illinois Basin coals. Fuel. 2021 Apr 1;289.
Journal cover image

Published In

Fuel

DOI

ISSN

0016-2361

Publication Date

April 1, 2021

Volume

289

Related Subject Headings

  • Energy
  • 4019 Resources engineering and extractive metallurgy
  • 4012 Fluid mechanics and thermal engineering
  • 4004 Chemical engineering
  • 0913 Mechanical Engineering
  • 0904 Chemical Engineering
  • 0306 Physical Chemistry (incl. Structural)