Título The SrCO3/SrO system for thermochemical energy storage at ultra-high temperature
Autores Amghar N. , ORTIZ DOMÍNGUEZ, CARLOS, Perejón A. , Valverde J.M. , Maqueda L.P. , Sánchez Jiménez P.E.
Publicación externa No
Medio SOLAR ENERGY MATERIALS AND SOLAR CELLS
Alcance Article
Naturaleza Científica
Cuartil JCR 1
Cuartil SJR 1
Impacto JCR 6.90000
Impacto SJR 1.50300
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-85124085082&doi=10.1016%2fj.solmat.2022.111632&partnerID=40&md5=c2a82b1f66bf66046d9c486589061d09
Fecha de publicacion 01/05/2022
ISI 761250300001
Scopus Id 2-s2.0-85124085082
DOI 10.1016/j.solmat.2022.111632
Abstract Thermochemical energy storage (TCES) has attracted interest in the last years due to the possibility of attaining high energy densities, seasonal storage capacity and greater efficiencies than currently commercial thermal energy storage systems using molten salts. This work analyses the potential of an ultra-high temperature TCES system based on the SrCO3/SrO system. The process relies upon the reversible decomposition of SrCO3 into SrO and CO2. As proposed in previous works for the integration of the Ca-Looping process to store energy in CSP plants, both the calcination (endothermic) and carbonation (exothermic) reactions are carried out in a closed CO2 loop. At these conditions, the required temperature to attain full calcination in short residence times is around 1400 °C whereas carbonation takes place at about 1200 °C. Using this process, the energy density potentially achievable by the storage material is very high (around 2000 MJ/m3) while the ultra-high carbonation temperature would improve thermoelectric efficiency. The enhancement of the multicycle performance of the SrCO3/SrO system using refractory additives is also explored. Even though current commercial CSP plants with tower technology cannot yet operate at these ultra-high temperatures, recent advances in the development of high-temperature solar receivers could allow operation at 1400 °C in the medium term. Finally, a conceptual model of the integration of the SrCO3/SrO system in a CSP plant supports higher overall efficiency and energy density, but lower solar-to-electric efficiency due to thermal losses. © 2022 The Authors
Palabras clave Additives; Calcium; Calcium compounds; Carbon dioxide; Carbonation; Electric losses; Heat storage; Storage (materials); Strontium compounds; Calcium looping; CSP; Energy density; Higher energy density
Miembros de la Universidad Loyola

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