Leaching of lanthanide and yttrium from a Central Appalachian coal and the ashes obtained at 550–950 °C

Lin, Ronghong; Soong, Yee; Howard, Bret H.; Keller, Murphy J.; Roth, Elliot A.; Wang, Ping; Granite, Evan J.

doi:10.1016/j.jre.2021.02.012

Title: Leaching of lanthanide and yttrium from a Central Appalachian coal and the ashes obtained at 550–950 °C

Journal Article · Tue Mar 01 00:00:00 UTC 2022 · Journal of Rare Earths

DOI: https://doi.org/10.1016/j.jre.2021.02.012 · OSTI ID:1868073

^[1]; Soong, Yee ^[1]; Howard, Bret H. ^[1]; Keller, Murphy J. ^[1]; Roth, Elliot A. ^[2];

^[1]; Granite, Evan J. ^[1]

National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); KeyLogic Systems, LLC, Pittsburgh, PA (United States)

Here in this work, we investigated leaching of lanthanide and yttrium (REY) from a Central Appalachian coal and its ashes obtained at 550–950 °C with the main purpose of understanding the impact of ashing temperature on REY leachability in water, ammonium sulfate, and hydrochloric acid. It is found that the coal contains a negligible amount of water-soluble REY, less than 1% ion-exchangeable REY, and about 28% of HCl-soluble REY. Ashing leads to dramatic changes in REY leachability in both ammonium sulfate and hydrochloric acid solutions, which is believed to be related to transformation and redistribution of organically-associated REY in coal during the ashing process. Ashing temperature significantly affects REY leaching from coal ashes; higher ashing temperature results in lower REY leachability in both solutions. Clay minerals may play a significant role in changing the leachability of REY after ashing. In addition, the results also suggest that the organic matter in the coal is relatively enriched in heavy REY.

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Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)

Sponsoring Organization:: USDOE; USDOE Office of Fossil Energy (FE)

OSTI ID:: 1868073

Journal Information:: Journal of Rare Earths, Journal Name: Journal of Rare Earths Journal Issue: 5 Vol. 40; ISSN 1002-0721

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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