Publication de 8 numéros par an
ISSN Imprimer: 2150-3621
ISSN En ligne: 2150-363X
Indexed in
SCANNING ELECTRON MICROSCOPY AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY OF LOW-SULFUR COAL FLY ASH
RÉSUMÉ
Fly ash is a heterogeneous material produced during the burning of pulverized coal in thermoelectric power stations, and its phase and mineral composition includes (i) an inorganic constituent, amorphous and crystalline; (ii) an organic constituent composed of char materials (slightly changed, semicoked and coked particles) and organic minerals; and (iii) fluid constituent. Hence the characterization of fly ash is usually made using several methods. However, scanning electron microscopy (SEM) is the best method and is, along with X-ray diffraction, one of the most widely used techniques for the identification and characterization of phases in fly ash, especially with an SEM equipped with an energy-dispersive X-ray spectrometer (EDS). In this study SEM/EDS was carried out to analyze two high-volatility low-sulfur coals and the fly ash resulting from the combustion of a 50:50 ratio blend of these coals.
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Valentim Bruno, Shreya Neha, Paul Biswajit, Gomes Celeste Santos, Sant'Ovaia Helena, Guedes Alexandra, Ribeiro Joana, Flores Deolinda, Pinho Sílvia, Suárez-Ruiz Isabel, Ward Colin R., Characteristics of ferrospheres in fly ashes derived from Bokaro and Jharia (Jharkand, India) coals, International Journal of Coal Geology, 153, 2016. Crossref
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Shreya Neha, Valentim Bruno, Paul Biswajit, Guedes Alexandra, Pinho Sílvia, Ribeiro Joana, Ward Colin R., Flores Deolinda, Multi-technique study of fly ash from the Bokaro and Jharia coalfields (Jharkhand state, India): A contribution to its use as a geoliner, International Journal of Coal Geology, 152, 2015. Crossref
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Predeanu Georgeta, Popescu Luminiţa Georgeta, Abagiu Traian Alexandru, Panaitescu Cornelia, Valentim Bruno, Guedes Alexandra, Characterization of bottom ash of Pliocene lignite as ceramic composites raw material by petrographic, SEM/EDS and Raman microspectroscopical methods, International Journal of Coal Geology, 168, 2016. Crossref
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Valentim Bruno, Flores Deolinda, Guedes Alexandra, Shreya Neha, Paul Biswajit, Ward Colin R., Vermicular kaolinite relics in fly ash derived from Bokaro and Jharia coals (Jharkhand, India), International Journal of Coal Geology, 162, 2016. Crossref
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Valentim Bruno, Flores Deolinda, Guedes Alexandra, Shreya Neha, Paul Biswajit, Ward Colin R., Notes on the occurrence of char plerospheres in fly ashes derived from Bokaro and Jharia coals (Jharkhand, India) and the influence of the combustion conditions on their genesis, International Journal of Coal Geology, 158, 2016. Crossref
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Suárez-Ruiz I., Valentim B., Borrego A.G., Bouzinos A., Flores D., Kalaitzidis S., Malinconico M.L., Marques M., Misz-Kennan M., Predeanu G., Montes J.R., Rodrigues S., Siavalas G., Wagner N., Development of a petrographic classification of fly-ash components from coal combustion and co-combustion. (An ICCP Classification System, Fly-Ash Working Group – Commission III.), International Journal of Coal Geology, 183, 2017. Crossref
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Guimarães Renato, Guedes Alexandra, Valentim Bruno, Identification and Characterization of Ti-Spheres (Titanspheres) in Cork Powder Fly Ash, Waste and Biomass Valorization, 11, 6, 2020. Crossref
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Badenhorst Charlotte, Santos Cláudia, Lázaro-Martínez Juan, Białecka Barbara, Cruceru Mihai, Guedes Alexandra, Guimarães Renato, Moreira Karen, Predeanu Georgeta, Suárez-Ruíz Isabel, Cameán Ignacio, Valentim Bruno, Wagner Nicola, Assessment of Graphitized Coal Ash Char Concentrates as a Potential Synthetic Graphite Source, Minerals, 10, 11, 2020. Crossref
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Tang Yanxia, Zhu Keyong, Huang Yong, Radiative properties of porous fly ash particles based on the particle superposition model, Journal of Quantitative Spectroscopy and Radiative Transfer, 277, 2022. Crossref
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Santos Ana Cláudia, Guedes Alexandra, French David, Futuro Aurora, Valentim Bruno, Integrative Study Assessing Space and Time Variations with Emphasis on Rare Earth Element (REE) Distribution and Their Potential on Ashes from Commercial (Colombian) Coal, Minerals, 12, 2, 2022. Crossref
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Hanif Asad, Usman Muhammad, Fly ash cenosphere: characterization, processing, and properties, in Handbook of Fly Ash, 2022. Crossref
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Mabuza Major, Premlall Kasturie, Daramola Michael O., Physicochemical characterization of South African coals upon short-term flue gas exposure using conventional and advanced techniques, Materials Science for Energy Technologies, 3, 2020. Crossref
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Valentim Bruno, Petrography of coal combustion char: A review, Fuel, 277, 2020. Crossref