Journal ArticleDOI
Zinc Speciation in Power Plant Burning Mixtures of Coal and Tires
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TLDR
In this paper, 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.Abstract:
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 amounts of coal-derived carbons, Fe-spinels, and tire-derived carbons, has Zn concentrations ranging from 2200 ppm (1^st^ ESP row) to 6900 ppm Zn (3^rd^ ESP row). Zinc occurs in Zn-rich nanoparticles in the Al-Si glass phases and as ZnO in amorphous and crystalline nanominerals, Fe- and Zn-sulfides, Pb-Al-Fe sulfates, and Zn sulfates. Iron-rich, Al- and Ti-bearing spinels contain accessory Zn^2+^, Cr^3+^, Mn^2+^, and Pb^2+^. Fe-sulfates and phosphates nanoparticles incorporate As, Cr, V, Ni, and Zn. Fullerenes were not detected in this fly ash, potentially due to the higher temperature of combustion in the cyclone boiler. Zinc was detected by XPS, but the low binding energies mitigated against the determination of the speciation of the element.read more
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Petrographic examination of coal-combustion fly ash
TL;DR: The complexity of fly ash can be described by petrographic studies as mentioned in this paper, where the forms of carbons and their relationship to the inorganic fly ash constituents, the burnout of coal and non-coal carbons, and the efficiency of combustion are described.
Journal ArticleDOI
Applied investigation on the interaction of hazardous elements binding on ultrafine and nanoparticles in Chinese anthracite-derived fly ash
Luis F.O. Silva,André Jasper,María Luisa Andrade,Carlos Hoffmann Sampaio,Shifeng Dai,Xiao Li,Tian Li,Weimei Chen,Xibo Wang,Huidong Liu,Lixin Zhao,Shelley G. Hopps,Robert Jewell,James C. Hower +13 more
TL;DR: A multifaceted instrumental approach was employed to determine the chemistry and mineralogy of pulverized-coal-combustion fly ashes from two Chinese power plants, demonstrating and bringing together the wide variety of procedures dealing with F as the key element of concern, and determining its location in the mineral nanoparticles.
Journal ArticleDOI
A Note on the Occurrence of Yttrium and Rare Earth Elements in Coal Combustion Products
James C. Hower,Shifeng Dai,Vladimir V. Seredin,Lei Zhao,Irena Kostova,Luis F.O. Silva,Sarah M. Mardon,Glbin Gurdal +7 more
TL;DR: In this paper, the concentrations of rare earth elements (REEs) in coal-combustion fly ash were investigated in a power plant burning a variety of coals, including coal-derived fly ash and pet coke.
Journal ArticleDOI
Zinc Isotope Variability in Three Coal-Fired Power Plants: A Predictive Model for Determining Isotopic Fractionation during Combustion
TL;DR: The zinc (Zn) isotope compositions of feed materials and combustion byproducts were investigated in three different coal-fired power plants, and the results were used to develop a generalized model that can account for Zn isotopic fractionation during coal combustion.
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The Influence of the Morphology and Mechanical Properties of Polymer Inclusion Membranes (PIMs) on Zinc Ion Separation from Aqueous Solutions
Katarzyna Witt,Elzbieta Radzyminska-Lenarcik,Artur Kosciuszko,Magdalena Gierszewska,Kamil Ziuziakowski +4 more
TL;DR: The transport of Zn(II) ions across polymer inclusion membranes (PIMs) with acetylacetone (ACAC) or di(2-ethylhexyl)phosphoric acid (D2EHPA) as carriers was studied and the influence of membrane morphology and mechanical properties on the zinc transport process was discussed.
References
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