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Extracting rare-earth elements from coal could soon

2016-2-2 · The U.S. could soon decrease its dependence on importing valuable rare-earth elements that are widely used in many industries, according to a team of Penn State and U.S. Department of Energy researchers who found a cost-effective and environmentally friendly way to extract these metals from coal

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Coal National Geographic Society

Bituminous coal accounts for almost half of all the coal that is used for energy in the United States. It is mainly mined in Kentucky, Pennsylvania, and West Virginia. Outside the U.S., nations such as Russia and Colombia rely on bituminous coal for energy and industrial fuel. Anthracite Anthracite is the highest rank of coal

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Sulfur species in perchloroethylene and other coal

OSTI.GOV Conference: Sulfur species in perchloroethylene and other coal extracts

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The Process of Unconventional Natural Gas

2021-1-4 · Coalbed methane (CBM) was first extracted from coal mines as a safety measure to reduce the explosion hazard posed by methane gas in the mines. Today the methane is captured and used as a source of energy. Deeper coal formations might require hydraulic fracturing to

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How Coal Works Union of Concerned Scientists

2017-12-15 · Preparation generally includes crushing the coal and removing heavy, extraneous non-coal materials. If coal is high in sulfur or other impurities, it is washed with a water or chemical bath, removing up to 40 percent of inorganic sulfur in the coal. Not

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Coal prices and outlook U.S. Energy Information

2020-10-9 · Subbituminous coal has a higher heating value than lignite. Subbituminous coal typically contains 35%–45% carbon, compared with 25%–35% for lignite. About 44% of the coal produced in the United States in 2019 was subbituminous. Bituminous coal contains 45%–86% carbon and has two to three times the heating value of lignite.

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In situ small-angle x-ray scattering from coal during

1990-10-1 · OSTI.GOV Journal Article: In situ small-angle x-ray scattering from coal during fluid extraction Title: In situ small-angle x-ray scattering from coal during fluid extraction Full Record

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Considering non-power generation uses of coal in the

2020-5-1 · In fact, fly ash from U.S. coal can contain over 1000 parts per millions (ppm) of REE's and other trace materials,which can compound to over a kilogram of rare earth materials per ton of processed fly ash. The extraction of REE's from coal ash presents an alternative for the U.S. in terms of diversifying supply and ultimately, an alternative to imports.

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A life cycle inventory of coal used for electricity

This study inventories material and energy inputs and emissions in not only the Materials Processing stage (coal combustion) but also in the Raw Material Extraction (including coal mining and preparation) and Material Disposal (involving coal combustion products) stages, using data collected from four coal-burning utilities in Florida and SimaPro software (version 5.1, PRé Consultants, The Netherlands).

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Selective Recovery of Rare Earth Elements from Coal

2021-3-12 · Here, we studied two liquid membrane processes (liquid emulsion membranes, LEM, and supported liquid membranes, SLM) and compared them to standard solvent extraction techniques for selective recovery and concentration of REEs from a leachate of coal fly ash. All separation methods involved an organic solution of di(2-ethylhexyl)phosphoric acid dissolved in kerosene or mineral oil

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Rare earth elements in coal and coal fly ash

2019-9-12 · The United States has the world’s largest coal reserves and, even though gas-­fired power generation has increased significantly in the last decade, the United States continues to produce vast quantities of fly ash, about half of which is beneficially reused, primarily in construction materials.

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Appendix E: Coal Mining and Processing Methods

2021-6-28 · In surface mining, the ground covering the coal seam (the overburden) is first removed to expose the coal seam for extraction. The elements of a surface mining operation are (1) topsoil removal and storage for later use, (2) drilling and blasting the strata overlying the coal

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Trace Elements in Coal Ash USGS

2015-5-7 · Trace Elements in Coal Ash Overview. According to the U.S. Energy Information . Association (EIA), approximately 37 percent of the electricity currently produced in the United States is generated using coal (U.S. Energy Information Administration, 2013). Coal ash Flue gas (also known as coal combustion products)

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Coal Production in the United States An Historical

2015-12-28 · COAL PRODUCTION IN THE UNITED STATES AN HISTORICAL OVERVIEWa Coal has been an energy source for hundreds of years in the United States. It helped provide many basic needs, from energy for domestic heating and cooking, to transportation for people, products, and raw materials, to energy for industrial applications and electricity generation.

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Extracting rare earth elements from coal with plasma

2020-2-13 · Rare earth elements (REEs) are vital materials for modern technologies. The US National Energy Technology Laboratory (NETL) is collaborating with the University of Kentucky and their subcontractor Virginia Tech to demonstrate a novel process for the extraction of REEs from coal

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How Coal Works Union of Concerned Scientists

2017-12-15 · How coal is mined. In 2016, the United States burned roughly 728 million tons of coal, enough to fill a typical railroad car every 4 seconds .The electricity sector accounted for over 90 percent of all coal used in the United States, with the rest

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MATERIAL RESOURCES, PRODUCTIVITY AND THE

2021-4-25 · Europe account for 35% of extraction while member countries in the Asia-Pacific are responsible for the remaining 15% of extraction. Among OECD countries, the United States is the single largest extractor of material resources with over 6.5 Gt extracted in 2008 one third of all materials extracted in OECD countries. Australia, Canada,

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Selective Recovery of Rare Earth Elements from Coal

2021-3-12 · Coal combustion residues and other geological waste materials have been proposed as a resource for rare earth elements (REEs, herein defined as the 14 stable lanthanides, yttrium, and scandium). The extraction of REEs from residues often generate acidified leachates that require highly selective separation methods to recover the REEs from other major soluble ions in the leachates.

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Selective Recovery of Rare Earth Elements from Coal

2019-3-25 · Coal combustion residues and other geological waste materials have been proposed as a resource for rare earth elements (REEs, herein defined as the 14 stable lanthanides, yttrium, and scandium). The extraction of REEs from residues often generate acidified leachates that require highly selective separation methods to recover the REEs from other major soluble ions in the leachates.

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Coal Chemistry Encyclopedia structure, water, uses

Coal, a naturally occurring combustible solid, is one of the world's most important and abundant energy sources. From its introduction 4,000 years ago as a fuel for heating and cooking, to its nineteenth- and twentieth-century use in generating electricity and as a chemical feedstock,coal

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