Back
 GM  Vol.4 No.3 , July 2014
Dehydration of Gypsum Rock by Solar Energy: Preliminary Study
Abstract: The dehydration process of gypsum rock was studied under concentrated solar energy by using a Fresnel lens with power density of 260 Wcm-2. Temperatures higher than 700。C were attained for 1 min of solar exposure. The effect of grain size of sample and radiation exposure time on the formation of bassanite and anhydrite was studied by XRD. The complete transformation of dihydrate into hemihydrate and/or anhydrate phases is complete for the finer size sample. Plaster composed of 92.7% of anhydrite and 7.3% of bassanite was obtained for 5 min of solar exposure. Morphological and textural modifications were followed by SEM and interferometric/confocal profilometer.
Cite this paper: López-Delgado, A. , López-Andrés, S. , Padilla, I. , Alvarez, M. , Galindo, R. and José Vázquez, A. (2014) Dehydration of Gypsum Rock by Solar Energy: Preliminary Study. Geomaterials, 4, 82-91. doi: 10.4236/gm.2014.43009.
References

[1]   Gunn, J.R. (1968) Evolution in Gypsum Mining. Gypsum Journal, 49, 14-18.

[2]   Atedy: Asociación técnica y empresarial del yeso (2009) http://www.atedy.es/principal.asp

[3]   Marchán Sanz, C. and Regueiro y González-Barros, M. (2011) Panorama Minero. Instituto Geológico y Minero de Espana (IGME)—Dirección General de Política Energética y Minas (Ministerio de Industria, Energía y Turismo).
http://www.igme.es/internet/PanoramaMinero/actual/yeso%2012.pdf

[4]   Escavy, J.I., Herrero, M.J. and Arribas, M.E. (2012) Gypsum Resources of Spain: Temporal and Spatial Distribution. Ore Geology Reviews, 49, 72-84. http://dx.doi.org/10.1016/j.oregeorev.2012.09.001

[5]   Sanz Arauz, D. (2009) Análisis de yeso empleado en los revestimientos exteriores mediante técnicas geológicas. Ph.D. Thesis, Universidad Politécnica de Madrid (UPM), Madrid.

[6]   Wirsching, F. (2005) Calcium sulphate. Ullmanns′s Encyclopedia of Industrial Chemistry. Wiley-VCH verlag GmbH & co. KGaA, Weinheim.

[7]   Escavy, J.I. and Herrero, M.J. (2013) The Use of Location-Allocation Techniques for Exploration Targeting of Place-Value Industrial Minerals: A Market-Based Prospectivity Study of the Spanish Gypsum Resources. Ore Geology Reviews, 53, 504-516. http://dx.doi.org/10.1016/j.oregeorev.2013.02.010

[8]   Villanueva, L. (2004) Evolución histórica de la construcción con Yeso. Informes de la construcción, 56, 5-12.

[9]   Xie, W.T., Dai, Y.J., Wang, R.Z. and Sumathy, K. (2011) Concentrated Solar Energy Applications Using Fresnel Lenses: A Review. Renewable and Sustainable Energy Reviews, 15, 2588-2606.
http://dx.doi.org/10.1016/j.rser.2011.03.031

[10]   Sierra, C. and Vázquez, A. (2005) High Solar Energy Concentration with a Fresnel Lens. Journal of Materials Science, 40, 1339-1343. http://dx.doi.org/10.1007/s10853-005-0562-6

[11]   Romero, A., García, I., Arenas, M.A., López, V. and Vázquez, A. (2013) High Meting Point Metals Welding by Concentrated Solar Energy. Solar Energy, 95, 131-143.
http://dx.doi.org/10.1016/j.solener.2013.05.019

[12]   Nemet, A., Kravanja, Z. and Klemes, J.J. (2012) Integration of Solar Thermal Energy into Processes with Heat Demand. Clean Techn Environ Policy, 14, 453-463. http://dx.doi.org/10.1007/s10098-012-0457-6

[13]   Llorente, J. and Vázquez, A.J. (2009) Solar Hardening of Steels with a New Small Scale Solar Concentrator. Materials Chemistry and Physics, 118, 86-92.
http://dx.doi.org/10.1016/j.matchemphys.2009.07.008

[14]   Puche Riart, O., Mazadiego Martinez, L.F., Ortiz Menéndez, J.E. and Llamas Borrajo, J.F. (2007) Historic Gypsum-Kilns (Morata de Tajuna, Madrid). Materiales de Construcción, 57, 81-87.

[15]   Sierra, C. and Vazquez, A.J. (2006) NiAl Coating on Carbon Steel with an Intermediate Ni Gradient Layer. Surface & Coatings Technology, 200, 4383-4388. http://dx.doi.org/10.1016/j.surfcoat.2005.02.176

[16]   Sobrino, J.A. (2000) Caracterización de una lente de Fresnel para la modificación superficial de materiales. Proyecto Fin de Carrera 99-01-106775, Universidad de Castilla-La Mancha (UCLM), Spain.

[17]   Ferreire, A., Rodríguez, G.P. and Sobrino, J.A. (2004) Flux Distribution Delivered by a Fresnel Lens Used for Concentrating Solar Energy. Journal of Solar Energy Engineering, 126, 654-660.
http://dx.doi.org/10.1115/1.1638783

[18]   Chung, F.H. (1974) Quantitative Interpretation of X-Ray Diffraction Patterns of Mixtures. I. Matrix-Flushing Method for Quantitative Multicomponent Analysis. Journal of Applied Crystallography, 7, 519-525.
http://dx.doi.org/10.1107/S0021889874010375

[19]   Chung, F.H. (1974). Quantitative Interpretation of X-Ray Diffraction Patterns of Mixtures. II. Matrix-Flushing Method for Quantitative Multicomponent Analysis. Journal of Applied Crystallography, 7, 526-531.
http://dx.doi.org/10.1107/S0021889874010387

[20]   Van Driessche, A.E.S., Benning, L.G., Rodriguez-Blanco, J.O., Ossorio, M., Bots, P. and García Ruiz, J.M. (2012) The Role and Implications of Bassanite as a Stable Precursor Phase to Gypsum Precipitation. Science, 336, 69-72.
http://dx.doi.org/10.1126/science.1215648

 
 
Top