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dc.contributor.authorPadilla, Isabel-
dc.contributor.authorLópez-Delgado, Aurora-
dc.contributor.authorLópez-Andrés, Sol-
dc.contributor.authorÁlvarez, M.-
dc.contributor.authorGalindo, R.-
dc.contributor.authorVázquez, Alfonso J.-
dc.identifierdoi: 10.1155/2014/825745-
dc.identifierissn: 1537-744X-
dc.identifier.citationThe Scientific World Journal 2014 (ID 825745, 2014)-
dc.description.abstractThe 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. © 2014 Isabel Padilla et al.-
dc.publisherHindawi Publishing Corporation-
dc.subjectSolar energy-
dc.subjectSynthesis alumina-
dc.titleThe application of thermal solar energy to high temperature processes: Case study of the synthesis of alumina from boehmite-
dc.description.versionPeer Reviewed-
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