James C. Hower
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View article: Abundances of elements in global coals
Abundances of elements in global coals Open
View article: A commentary on the paper “Low-temperature subcritical water dechlorination composites of waste PVC/coal fly ash with powerful sensing activity for chemiluminescent detection of acetamiprid and imidacloprid”
A commentary on the paper “Low-temperature subcritical water dechlorination composites of waste PVC/coal fly ash with powerful sensing activity for chemiluminescent detection of acetamiprid and imidacloprid” Open
View article: Probing the Critical Element Chemistry of Coal-Combustion Fly Ash: Examination of Zircon and Associated Minerals from a Beneficiated Kentucky Fly Ash
Probing the Critical Element Chemistry of Coal-Combustion Fly Ash: Examination of Zircon and Associated Minerals from a Beneficiated Kentucky Fly Ash Open
Along with the principal rare earth (REE) minerals such as monazite, xenotime, and bastnasite, Y-and REE-bearing zircon and associated minerals survive the combustion process and are found in coal-combustion fly ash. Beneficiated fly ash f…
View article: Assessment of Rare Earth Element Potential in Gulf Coast Coals and Coal Ash
Assessment of Rare Earth Element Potential in Gulf Coast Coals and Coal Ash Open
United States heavy reliance on imports of critical minerals (CMs), including rare earth elements (REEs), underscores the importance of development of domestic sources. The study objective was to quantify CM and REE concentrations in coals…
View article: Predictive Assessment of the Chemical Composition of Coal Ash in Reserve at U.S. Disposal Sites
Predictive Assessment of the Chemical Composition of Coal Ash in Reserve at U.S. Disposal Sites Open
In the United States, more than 2 Gt of coal combustion residuals (i.e., coal ash) are stored in hundreds of disposal units. Recent federal regulations mandate the closure or retrofitting of most coal ash impoundments, presenting significa…
View article: Petrology and geochemistry of the Middle Pennsylvanian (Langsettian) Clintwood coalbed, Pike County, Kentucky
Petrology and geochemistry of the Middle Pennsylvanian (Langsettian) Clintwood coalbed, Pike County, Kentucky Open
View article: Electron microbeam investigations of the spent ash from the pilot-scale acid extraction of rare earth elements from a beneficiated Kentucky fly ash
Electron microbeam investigations of the spent ash from the pilot-scale acid extraction of rare earth elements from a beneficiated Kentucky fly ash Open
View article: Effect of Aluminum Fluoride Formation on ICP-MS Determination of Critical Elements in Alumina-Rich Coal Fly Ash
Effect of Aluminum Fluoride Formation on ICP-MS Determination of Critical Elements in Alumina-Rich Coal Fly Ash Open
View article: Component Identification of Solid Biomass Fuels Using Reflected Light Microscopy: Interlaboratory Study 2
Component Identification of Solid Biomass Fuels Using Reflected Light Microscopy: Interlaboratory Study 2 Open
View article: The Stacking of Graphene in a Pseudocrystallite
The Stacking of Graphene in a Pseudocrystallite Open
View article: Zinc speciation in power plant burning mixtures of coal and tires
Zinc speciation in power plant burning mixtures of coal and tires Open
Fly ash from the cyclone-boiler co-combustion of high-S, high volatile bituminous coal and tire-derived fuel (tdf) was studied using a variety of chemical, optical, and microbeam techniques. Fly ash, dominated by Al-Si glass with lesser am…
View article: Influence of Coal-Fired Power Plant Emissions Regulations and Consequent Engineering Controls and Coal-Supply Modifications on Fly Ash Chemistry and Petrology
Influence of Coal-Fired Power Plant Emissions Regulations and Consequent Engineering Controls and Coal-Supply Modifications on Fly Ash Chemistry and Petrology Open
The chemistry and petrology of fly ash are controlled by a number of factors: (1) chemistry of the feed coal (and added fuels, such as petroleum coke, tires, biomass, etc.), (2) particle size of the fuel feed (controlled by pulverized fuel…
View article: Location of Cerium in Coal-Combustion Fly Ashes
Location of Cerium in Coal-Combustion Fly Ashes Open
Given the worldwide demand for rare earth elements (REEs) in modern electronics, all potential sources of the REEs should be investigated. Coal-combustion fly ash represents a potential source of REEs. Fly ashes, derived from the combustio…
View article: Geochemistry and Mineralogy of Coal-Fired Circulating Fluidized Bed Combustion Fly Ashes
Geochemistry and Mineralogy of Coal-Fired Circulating Fluidized Bed Combustion Fly Ashes Open
The fuel, bed ash, and fly ash were sampled from a circulating fluidized bed combustion (CFBC) unit at two times. The first sampling was a high-sulfur (S) coal-only run, and the second sampling coincided with an experimental burn of up to …
View article: A Note on the Occurrence of Yttrium and Rare Earth Elements in Coal Combustion Products
A Note on the Occurrence of Yttrium and Rare Earth Elements in Coal Combustion Products Open
There is an international need for a variety of lanthanide elements (rare earth elements, or REEs) in modern electronic and related components. This has led to a desire to broaden production from both previously productive locations and to…
View article: Mineralogy and Geochemistry of Feed Coals and Combustion Residues from Tunçbilek and Seyitömer Coal-Fired Power Plants in Western Turkey
Mineralogy and Geochemistry of Feed Coals and Combustion Residues from Tunçbilek and Seyitömer Coal-Fired Power Plants in Western Turkey Open
This study focuses on the enrichment of elements in feed coal (FC) and combustion residues, namely, fly ash (FA) and bottom ash (BA) samples, picked up from the Tunçbilek and Seyitömer coal-fired power plants in western Turkey. The FCs in …
View article: RARE EARTH ELEMENTS IN COAL FLY ASH AND THEIR POTENTIAL RECOVERY
RARE EARTH ELEMENTS IN COAL FLY ASH AND THEIR POTENTIAL RECOVERY Open
View article: Coal ash resources and potential for rare earth element production in the United States
Coal ash resources and potential for rare earth element production in the United States Open
The renewable energy industry is heavily reliant on rare earth elements, underscoring the need to develop resources and production. The objective of this work was to estimate coal ash resources and potential for extraction of rare earth el…
View article: Transformation of organic to inorganic nitrogen in NH4+-illite-bearing and Ga-Al-REE-rich bituminous coals: Evidence from nitrogen isotopes and functionalities
Transformation of organic to inorganic nitrogen in NH4+-illite-bearing and Ga-Al-REE-rich bituminous coals: Evidence from nitrogen isotopes and functionalities Open
Nitrogen is one of the most important elements and mainly occurs as organic forms in coal, and in a few cases, in an inorganic form. Organic nitrogen in coal is mainly derived from the proteins of plants and micro-organisms but sources of …
View article: Atlas of Microscopic Images of Biochar
Atlas of Microscopic Images of Biochar Open
Derived through the thermochemical conversion of biomass, biochar is a carbon-rich substance recognized for its significance in environmental applications and sustainable agriculture. As interest in its utilization continues to rise, it be…
View article: High-cellulose content of in-situ Miocene fossil tree stumps and trunks from Lusatia lignite mining district, Federal Republic of Germany
High-cellulose content of in-situ Miocene fossil tree stumps and trunks from Lusatia lignite mining district, Federal Republic of Germany Open
Second Miocene Seam Complex (2nd MFK; germ.: 2. Mioz¨aner Fl¨ozkomplex) holds many in-situ, not permineralised fossil tree stumps and trunks with high-cellulose contents. The state of preservation of a set of in-situ fossil trees (Taxodiox…
View article: Trace Element Sampling and Partitioning Modeling to Estimate Wastewater Composition and Treatment Performance at Coal Generators
Trace Element Sampling and Partitioning Modeling to Estimate Wastewater Composition and Treatment Performance at Coal Generators Open
View article: Geochemistry of the Leatherwood coal in eastern Kentucky with an emphasis on enrichment and modes of occurrence of rare earth elements
Geochemistry of the Leatherwood coal in eastern Kentucky with an emphasis on enrichment and modes of occurrence of rare earth elements Open
View article: Geochemical and mineralogical evaluations of coal, shale, and mine waste overburden from Makum coalfield of the Northeast India
Geochemical and mineralogical evaluations of coal, shale, and mine waste overburden from Makum coalfield of the Northeast India Open
The Cenozoic-age Makum coal from northeastern India offers numerous research opportunities because of its diverse geochemical and geological characteristics. Due to its high sulfur content, the coal has been found to be less useful for ind…
View article: Recovery of Rare Earth Elements from Coal Fly Ash with Betainium Bis(trifluoromethylsulfonyl)imide: Different Ash Types and Broad Elemental Survey
Recovery of Rare Earth Elements from Coal Fly Ash with Betainium Bis(trifluoromethylsulfonyl)imide: Different Ash Types and Broad Elemental Survey Open
Previously, proof-of-concept studies have demonstrated that rare-earth elements (REEs) can be preferentially extracted from coal fly ash (CFA) solids using a recyclable ionic liquid (IL), betainium bis(trifluoromethylsulfonyl)imide ([Hbet]…
View article: Distribution of rare earth and other critical elements in lignites from the Eocene Jackson Group, Texas
Distribution of rare earth and other critical elements in lignites from the Eocene Jackson Group, Texas Open
Coal is increasingly evaluated as a source of rare earth elements (REEs) in the United States to address the overreliance on imported REEs. The objective of this study was to assess the distribution of REEs in lignites from selected mining…
View article: Was coal metamorphism an influence on the minor element chemistry of the Middle Pennsylvanian Springfield (No. 9) coal in Western Kentucky?
Was coal metamorphism an influence on the minor element chemistry of the Middle Pennsylvanian Springfield (No. 9) coal in Western Kentucky? Open
View article: Microstructural diversity and digestion yields of select bituminous and subbituminous coals as raw material candidates for carbon fiber precursor production
Microstructural diversity and digestion yields of select bituminous and subbituminous coals as raw material candidates for carbon fiber precursor production Open
View article: Functional Predictor Variables for the Leaching Potential of Arsenic and Selenium from Coal Fly Ash
Functional Predictor Variables for the Leaching Potential of Arsenic and Selenium from Coal Fly Ash Open
The release of leachates from intact coal ash impoundments is a concern due to the enrichment and mobilization of toxic elements such as arsenic (As) and selenium (Se). This study aims to explore the intrinsic properties of coal fly ash th…
View article: Fire Activities and Impacts on the Local Ecosystems in the Southern Ordos Basin During the Middle Jurassic: Evidence from Pyrogenic Pahs and Petrography of Inertinite-Rich Coal
Fire Activities and Impacts on the Local Ecosystems in the Southern Ordos Basin During the Middle Jurassic: Evidence from Pyrogenic Pahs and Petrography of Inertinite-Rich Coal Open