Signatures of rare earth element distributions in fly ash derived from the combustion of Central Appalachian, Illinois, and Powder River basin coals
The distribution of Rare Earth elements (REE) in coal-derived fly ashes can have distinctive patterns when fly ashes are produced from different coals within or between basins, such as the Pennsylvanian Class F fly ashes from the Illinois and Central Appalachian basins. Both the Fire Clay coal and a blend of a number of eastern Kentucky coals show strong Gd peaks and an H-type distribution in the Upper Continental Crust-corrected plots. The Fire Clay coal-derived ash has a higher heavy REE concentration than the blended coal-derived ash. The Illinois Basin-derived fly as has an overall lower REE concentration than the latter ashes. Class C fly ash derived from Powder River Basin coals has, with the exception of an Eu peak, a flatter distribution of REE and an overall L-type or indistinct H- versus L-type distribution. The signatures of the REE in fly ashes may be useful in predicting their behavior in the extraction of the REE; simple extrapolations from the basic concentrations and the predicted extraction percentages for ashes from different basins are not necessarily indicative of the actual distribution of the extracted REE.
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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)
Citation
Published In
DOI
ISSN
Publication Date
Volume
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)