Research Papers

New Thermal Energy Storage Materials From Industrial Wastes: Compatibility of Steel Slag With the Most Common Heat Transfer Fluids

[+] Author and Article Information
Iñigo Ortega-Fernández

CIC Energigune,
C/Albert Einstein 48,
Miñano, Álava 01510, Spain
e-mail: iortega@cicenergigune.com

Javier Rodríguez-Aseguinolaza

CIC Energigune,
C/Albert Einstein 48,
Miñano, Álava 01510, Spain
e-mail: jrodriguez@cicenergigune.com

Antoni Gil

CIC Energigune,
C/Albert Einstein 48,
Miñano, Álava 01510, Spain
e-mail: agil@cicenergigune.com

Abdessamad Faik

CIC Energigune,
C/Albert Einstein 48,
Miñano, Álava 01510, Spain
e-mail: afaik@cicenergigune.com

Bruno D’Aguanno

CIC Energigune,
C/Albert Einstein 48,
Miñano, Álava 01510, Spain
e-mail: bdaguanno@cicenergigune.com

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING: INCLUDING WIND ENERGY AND BUILDING ENERGY CONSERVATION. Manuscript received August 28, 2014; final manuscript received April 16, 2015; published online May 11, 2015. Assoc. Editor: Prof. Nathan Siegel.

J. Sol. Energy Eng 137(4), 041005 (Aug 01, 2015) (6 pages) Paper No: SOL-14-1247; doi: 10.1115/1.4030450 History: Received August 28, 2014; Revised April 16, 2015; Online May 11, 2015

Slag is one of the main waste materials of the iron and steel manufacturing. Every year about 20 × 106 tons of slag are generated in the U.S. and 43.5 × 106 tons in Europe. The valorization of this by-product as heat storage material in thermal energy storage (TES) systems has numerous advantages which include the possibility to extend the working temperature range up to 1000 °C, the reduction of the system cost, and at the same time, the decrease of the quantity of waste in the iron and steel industry. In this paper, two different electric arc furnace (EAF) slags from two companies located in the Basque Country (Spain) are studied. Their thermal stability and compatibility in direct contact with the most common heat transfer fluids (HTFs) used in the concentrated solar power (CSP) plants are analyzed. The experiments have been designed in order to cover a wide range of temperature up to the maximum operation temperature of 1000 °C corresponding to the future generation of CSP plants. In particular, three different fluids have been studied: synthetic oil (Syltherm 800®) at 400 °C, molten salt (Solar Salt) at 500 °C, and air at 1000 °C. In addition, a complete characterization of the studied slags and fluids used in the experiments is presented showing the behavior of these materials after 500 hr laboratory-tests.

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Behar, O., Khellaf, A., and Mohammedi, K., 2013, “A Review of Studies on Central Receiver Solar Thermal Power Plants,” Renewable Sustainable Energy Rev., 23(7), pp. 12–39. [CrossRef]
Gil, A., Medrano, M., Martorell, I., Lázaro, A., Dolado, P., Zalba, B., and Cabeza, L. F., 2010, “State of the Art on High Temperature Thermal Energy Storage for Power Generation—Part 1: Concepts, Materials and Modellization,” Renewable Sustainable Energy Rev., 14(1), pp. 31–55. [CrossRef]
Khare, S., Dell’Amico, M., Knight, C., and McGarry, S., 2013, “Selection of Materials for High Temperature Sensible Energy Storage,” Sol. Energy Mater Sol. Cells, 115(8), pp. 114–122. [CrossRef]
Fernández, A. I., Martínez, M., Segarra, M., Martorell, I., and Cabeza, L. F., 2010, “Selection of Materials With potential in Sensible Thermal Energy Storage,” Sol. Energy Mater. Sol. Cells, 94(10), pp. 1723–1729. [CrossRef]
Liu, M., Saman, W., and Bruno, F., 2012, “Review on Storage Materials and Thermal Performance Enhancement Techniques for High Temperature Phase Change Thermal Storage Systems,” Renewable Sustainable Energy Rev., 16(4), pp. 2118–2132. [CrossRef]
Cot-Gores, J., Castell, A., and Cabeza, L. F., 2012, “Thermochemical Energy Storage and Conversion: A State-of-the-Art Review of the Experimental Research Under Practical Conditions,” Renewable Sustainable Energy Rev., 16(7), pp. 5207–5224. [CrossRef]
IRENA, 2012, Renewable Energy Technologies: Cost Analysis Series-Concentrating Solar Power, International Renewable Energy Agency, Abu Dhabi, UAE. http://www.irena.org/documentdownloads/publications/re_technologies_cost_analysis-csp.pdf
Medrano, M., Gil, A., Martorell, I., Potau, X., and Cabeza, L. F., 2010, “State of the Art on High-Temperature Thermal Energy Storage for Power Generation—Part 2: Case Studies,” Renewable Sustainable Energy Rev., 14(1), pp. 56–72. [CrossRef]
Heath, G., Turchi, C., Burkhardt, J., and Kutscher, C., 2009, “Life Cycle Assessment of Thermal Energy Storage: Two-Tank Indirect and Thermocline,” Proceedings of the 3rd International Conference on Energy Sustainability, San Francisco, CA, pp. 689–690.
Martin, C., Breidenbach, N., and Eck, M., 2014, “Screening and Analysis of Potential Filler Materials for Molten Salt Thermocline Storages,” ASME Paper No. ES2014-6493. [CrossRef]
Laing, D., Bahl, C., Bauer, T., Fiss, M., Breidenbach, N., and Hempel, M., 2012, “High-Temperature Solid-Media Thermal Energy Storage for Solar Thermal Power Plants,” Proc. IEEE, 100(2), pp. 516–526. [CrossRef]
Py, X., Calvet, N., Olives, R., Meffre, A., Echegut, P., Bessada, C., Veron, E., and Ory, S., 2011, “Recycled Material for Sensible Heat Based Thermal Energy Storage to be Used in Concentrated Solar Thermal Power Plants,” ASME J. Sol. Energy Eng., 133(3), p. 031008. [CrossRef]
Van Oss, H., 2013, 2011 Minerals Yearbook: Slag-Iron and Steel, U.S. Geological Survey, Washington, DC. http://minerals.usgs.gov/minerals/pubs/commodity/iron_&_steel_slag/myb1-2011-fesla.pdf
Calvet, N., Dejean, G., Unamunzaga, L., and Py, X., 2013, “Waste From Metallurgic Industry: A Sustainable High-Temperature Thermal Energy Storage Material for Concentrated Solar Power,” ASME Paper No. ES2013-18333 [CrossRef].
Gil, A., Nicolas, C., Ortega, I., Risueño, E., Faik, A., Blanco, P., and Rodríguez-Aseguinolaza, J., 2014, “Characterization of a By-Product From Steel Industry Applied to Thermal Energy Storage in Concentrated Solar Power,” Proceedings of the 99th Eurotherm Seminar, Lleida, Spain, Paper No. EUROTHERM99-01-066. http://www.researchgate.net/publication/262764649_Characterization_of_a_by-product_from_steel_industry_applied_to_thermal_energy_storage_in_Concentrated_Solar_Power
EUROSLAG and EUROFER, 2012, Position Paper on the Status of Ferrous Slag Complying With the Waste Framework Directive 2008/CE (Articles 5/6) and the REACH Regulation, European Slag Association (EUROSLAG) and European Steel Association (EUROFER) http://www.euroslag.com/fileadmin/_media/images/Status_of_slag/Position_Paper_April_2012.pdf.
International Energy Agency, 2010, Technology Roadmap: Concentrating Solar Power, International Energy Agency (IEA), Paris. https://www.iea.org/publications/freepublications/publication/csp_roadmap.pdf
IHOBE, 1999, Libro blanco para la minimización de residuos y emisiones de escorias de acería, IHOBE, Bilbao, Spain. http://www.ihobe.eus/Publicaciones/Ficha.aspx?IdMenu=750e07f4-11a4-40da-840c-0590b91bc032&Cod=c70da2d6-f615-437e-ae5d-5eef0d61f1ab&Idioma=es-ES
Rodriguez-Carvajal, J., 1993, “Recent Advances in Magnetic Structure Determination by Neutron Powder Diffraction,” Phys. B, 192(1–2), pp. 55–59. [CrossRef]
Calvet, N., Gómez, J. C., Faik, A., Roddatis, V. V., Meffre, A., Glatzmaier, G. C., Doppiu, S., and Py, X., 2013, “Compatibility of a Post-Industrial Ceramic With Nitrate Molten Salts for Use as Filler Material in the Thermocline Storage System,” Appl. Energy, 109(9), pp. 387–393. [CrossRef]
Dow Chemical, Syltherm 800 Heat Transfer Fluid Product Technical Data, Dow Chemical, Midland, MI. http://www.loikitsdistribution.com/files/syltherm-800-technical-data-sheet.pdf


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Fig. 1

Pictures of the as-received EAF-Slag used in this study: AMS on the left and PTS on the right

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Fig. 2

XRD powder patterns of the reference and tested samples in air at 1000 °C after 500 hr of corrosion test

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Fig. 3

SEM images of EAF-Slags in contact with air—upper-left: raw AMS; lower-left: AMS after compatibility test; upper-right: raw PTS; and lower-right: PTS after compatibility test

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Fig. 4

XRD powder patterns of the Solar Salt before and after the corrosion test

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Fig. 5

ESEM images of the interfacial zone of the tested samples (upper AMS and lower PTS) with Solar Salt after 500 hr of corrosion test at 500 °C

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Fig. 6

FT-IR spectra of Syltherm 800®: as-received (bottom), in contact with AMS (middle), and in contact with PTS (top)

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Fig. 7

SEM images of EAF-Slags in contact with synthetic oil—upper-left: raw AMS; lower-left: AMS after compatibility test; upper-right: raw PTS; and lower-right: PTS after compatibility test



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