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Ca(OH)2/CaO reversible reaction in a fluidized bed reactor for thermochemical heat storage

Pardo, Pierre and Anxionnaz-Minvielle, Zoé and Rougé, Sylvie and Cognet, Patrick and Cabassud, Michel Ca(OH)2/CaO reversible reaction in a fluidized bed reactor for thermochemical heat storage. (2014) Solar Energy, 107. 605-616. ISSN 0038-092X

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Official URL: http://dx.doi.org/10.1016/j.solener.2014.06.010


Thermal energy storage (TES) is a key factor for increasing the efficiency of concentrated solar power plants. TES using a reversible chemical reaction appears to be a promising technology for high energy density thermal storage (100–500 kW h m-3), at high temperature(up to 1000 °C) and during a long period (24 h to several months). This paper details an experimental study to carry out the reversible reaction Ca(OH)2(s) + DHr <=> CaO(s) + H2O(g) in a fluidized bed (FB) reactor. The 4 micron Ca(OH)2 powder fluidization has been performed with an appropriate proportion of inert easy-to-fluidize particles. Then, Ca(OH)2 dehydration and CaO hydration have been implemented in a FB reactor and 50 cycles have been reached. The mean energy density obtained is 60 kW h m-3 solid_mixture which amounts to a promising energy density of 156 kW h m-3 Ca(OH)2-bulk if the reactants and the easy-to-fluidize particles are separated. The results demonstrated the feasibility of the implementation of the Ca(OH)2/CaO thermochemical heat storage in a fluidized bed reactor.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Solar Energy website : http://www.sciencedirect.com/science/journal/0038092X/
HAL Id:hal-01345769
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:18 Jul 2016 07:34

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