(633h) Determination and Recovery of Rare Earths from Coal Combustion By-Products
Approximately seven hundred eighty six million tons of coal were mined in the United States in 2017, with most burned to generate electricity. With an average concentration of 62 ppm, it is estimated that 45,000 tons of lanthanide elements are present within the coals burned each year in US power plants. The partitioning of the rare earths across US coal power stations is being investigated through a collaborative research effort between the Electric Power Research Institute and the Department of Energy. Early results suggest the lanthanides mainly partition to the bottom ash and the fly ash. A brief overview of recent results for the determination and recovery of rare earths in various solid samples obtained across different points within coal-burning plants will be presented, and future research will be discussed.
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