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Solid-State Reactions for the Storage of Thermal Energy

In this paper, the use of solid-state reactions for the storing of thermal energy at high temperature is proposed. The candidate reactions are eutectoid- and peritectoid-type transitions where all the components (reactants and reaction products) are in the solid state. To the best of our knowledge,...

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Autores principales: Doppiu, Stefania, Dauvergne, Jean-Luc, Palomo del Barrio, Elena
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416567/
https://www.ncbi.nlm.nih.gov/pubmed/30736490
http://dx.doi.org/10.3390/nano9020226
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author Doppiu, Stefania
Dauvergne, Jean-Luc
Palomo del Barrio, Elena
author_facet Doppiu, Stefania
Dauvergne, Jean-Luc
Palomo del Barrio, Elena
author_sort Doppiu, Stefania
collection PubMed
description In this paper, the use of solid-state reactions for the storing of thermal energy at high temperature is proposed. The candidate reactions are eutectoid- and peritectoid-type transitions where all the components (reactants and reaction products) are in the solid state. To the best of our knowledge, these classes of reactions have not been considered so far for application in thermal energy storage. This study includes the theoretical investigation, based on the Calphad method, of binary metals and salts systems that allowed to determine the thermodynamic properties of interest such as the enthalpy, the free energy, the temperature of transition, the volume expansion and the heat capacity, giving guidelines for the selection of the most promising materials in view of their use for thermal energy storage applications. The theoretical investigation carried out allowed the selection of several promising candidates, in a wide range of temperatures (300–800 °C). Moreover, the preliminary experimental study and results of the binary Mn-Ni metallic system are reported. This system showed a complex reacting behavior with several discrepancies between the theoretical phase diagram and the experimental results regarding the type of reaction, the transition temperatures and enthalpies and the final products. The discrepancies observed could be due both to the synthesis method applied and to the high sensitivity of the material leading to partial or total oxidation upon heating even if in presence of small amount of oxygen (at the ppm level).
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spelling pubmed-64165672019-03-29 Solid-State Reactions for the Storage of Thermal Energy Doppiu, Stefania Dauvergne, Jean-Luc Palomo del Barrio, Elena Nanomaterials (Basel) Article In this paper, the use of solid-state reactions for the storing of thermal energy at high temperature is proposed. The candidate reactions are eutectoid- and peritectoid-type transitions where all the components (reactants and reaction products) are in the solid state. To the best of our knowledge, these classes of reactions have not been considered so far for application in thermal energy storage. This study includes the theoretical investigation, based on the Calphad method, of binary metals and salts systems that allowed to determine the thermodynamic properties of interest such as the enthalpy, the free energy, the temperature of transition, the volume expansion and the heat capacity, giving guidelines for the selection of the most promising materials in view of their use for thermal energy storage applications. The theoretical investigation carried out allowed the selection of several promising candidates, in a wide range of temperatures (300–800 °C). Moreover, the preliminary experimental study and results of the binary Mn-Ni metallic system are reported. This system showed a complex reacting behavior with several discrepancies between the theoretical phase diagram and the experimental results regarding the type of reaction, the transition temperatures and enthalpies and the final products. The discrepancies observed could be due both to the synthesis method applied and to the high sensitivity of the material leading to partial or total oxidation upon heating even if in presence of small amount of oxygen (at the ppm level). MDPI 2019-02-07 /pmc/articles/PMC6416567/ /pubmed/30736490 http://dx.doi.org/10.3390/nano9020226 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Doppiu, Stefania
Dauvergne, Jean-Luc
Palomo del Barrio, Elena
Solid-State Reactions for the Storage of Thermal Energy
title Solid-State Reactions for the Storage of Thermal Energy
title_full Solid-State Reactions for the Storage of Thermal Energy
title_fullStr Solid-State Reactions for the Storage of Thermal Energy
title_full_unstemmed Solid-State Reactions for the Storage of Thermal Energy
title_short Solid-State Reactions for the Storage of Thermal Energy
title_sort solid-state reactions for the storage of thermal energy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6416567/
https://www.ncbi.nlm.nih.gov/pubmed/30736490
http://dx.doi.org/10.3390/nano9020226
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