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Título:
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The Application of Thermal Solar Energy to High Temperature Processes: Case Study of the Synthesis of Alumina from Boehmite
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Autores:
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Padilla, Isabel ;
López Delgado, Aurora ;
López Andrés, Sol ;
Álvarez Aguirre, Marta ;
Galindo Llorach, Roberto ;
Vázquez Vaamonde, Alfonso J.
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Tipo de documento:
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texto impreso
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Editorial:
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Hindawi Publishing Corporation, 2014-01
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Geología: Mineralogía
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Tipo = Artículo
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Resumen:
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The aim of this paper is to evaluate the feasibility of obtaining alumina from boehmite using a free, clean, and unlimited power source as the solar energy. Boehmite was obtained by hydrothermal treatment of a hazardous waste coming from aluminum slag milling. The waste is considered as a hazardous substance because of it releasing toxic gases (hydrogen, ammonia, methane, and hydrogen sulfide) in the presence of water. The as-obtained boehmite was transformed into alumina, in air atmosphere, using a solar energy concentrator (Fresnel lens). The solar installation provides a power density of 260?W·cm?2 which allows reaching temperatures upper than 1000°C at few minutes of exposure. Tests were performed at different periods of time that ranged between 5 and 90?min. The percentage of transformation of boehmite into alumina was followed by the water content of samples after solar radiation exposure. Samples were characterized by X-ray diffraction, infrared spectroscopy, and thermogravimetry. Metastable aluminas started to appear at 5?min and the crystalline and stable phase corundum at 10?min of solar radiation exposure.
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En línea:
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https://eprints.ucm.es/id/eprint/63870/1/The%20Application%20of%20Thermal.pdf
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