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Minerals 2016, 6(2), 32; https://doi.org/10.3390/min6020032

Notes on Contributions to the Science of Rare Earth Element Enrichment in Coal and Coal Combustion Byproducts

1
Center for Applied Energy Research, University of Kentucky, Lexington, KY 40511, USA
2
National Energy Technology Laboratory, U.S. Department of Energy, Pittsburgh, PA 15236-0940, USA
3
Gradient, 600 Stewart Street, Suite 1900, Seattle, WA 98101, USA
4
Gradient, 20 University Road, Cambridge, MA 02138, USA
5
Department of Geosciences, The University of Texas at Dallas, ROC 21, 800 West Campbell Road, Richardson, TX 75080-3021, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Mostafa Fayek
Received: 29 January 2016 / Revised: 4 March 2016 / Accepted: 25 March 2016 / Published: 31 March 2016
(This article belongs to the Special Issue Minerals in Coal)
View Full-Text   |   Download PDF [791 KB, uploaded 31 March 2016]   |  

Abstract

Coal and coal combustion byproducts can have significant concentrations of lanthanides (rare earth elements). Rare earths are vital in the production of modern electronics and optics, among other uses. Enrichment in coals may have been a function of a number of processes, with contributions from volcanic ash falls being among the most significant mechanisms. In this paper, we discuss some of the important coal-based deposits in China and the US and critique classification systems used to evaluate the relative value of the rare earth concentrations and the distribution of the elements within the coals and coal combustion byproducts. View Full-Text
Keywords: lanthanide; yttrium; critical materials; coal; coal combustion by-products lanthanide; yttrium; critical materials; coal; coal combustion by-products
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Hower, J.C.; Granite, E.J.; Mayfield, D.B.; Lewis, A.S.; Finkelman, R.B. Notes on Contributions to the Science of Rare Earth Element Enrichment in Coal and Coal Combustion Byproducts. Minerals 2016, 6, 32.

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