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Progress on materials for thermochemical storage

The effective management of sustainable energy systems requires the use of robust and efficient energy storage devices. Thermochemical storage is a technological alternative with significant advantages over conventional energy storage systems based on sensible and latent heat. Today one of the main scientific / technological challenges lies in the development of low-cost materials with structural resistance, high energy density and high cycling capacity (Chem. Rev. 2019, 119, 7, 4777–4816, https://doi.org/10.1021/acs.chemrev.8b00315).

The study published in Renewable Energy* analyzes the use of a granular material composed of Ca(OH)2 and γ-Al2O3 (in a 3:2 ratio by weight) and conveniently encapsulated with mesoporous alumina obtained by means of different precursors. The scientific work concludes that the proposed formulation leads to granules having high cyclability and energy density and identifies a coating that provides high cyclability and mechanical resistance. The characteristics of this material make it suitable for industrial applications operating at around 250 ºC.

This publication is result of the collaboration between the University King Juan Carlos, URJC, and IMDEA Energía within the framework of the regional research program ACES2030-CM on Concentrated solar thermal energy in the transport sector and in the production of heat and electricity.

(*) Valverde-Pizarro, C.M., Briones, L., Sanz, E., Escola, J.M., Sanz, R., González-Aguilar, J., Romero, M. Coating of Ca(OH)2 /γ-Al2O3 pellets with mesoporous Al2O3 and its application in thermochemical heat storage for CSP plants (2020) Renewable Energy, 162, pp. 587-595. https://doi.org/10.1016/j.renene.2020.08.095 

More information: José González-Aguilar, senior researcher, High Temperature Processes R&D Unit jose.gonzalez@imdea.org

Coating of Ca(OH)2 /γ-Al2O3 pellets with mesoporous Al2O3 and its application in thermochemical heat storage for CSP plants (Graphical abstract, https://doi.org/10.1016/j.renene.2020.08.095)

Event Date: 
Thursday, February 4, 2021