Fe-doped CaMnO3 for thermochemical heat storage application

Emanuela Mastronardo*, Xin Qian, Juan M. Coronado, Sossina Haile

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

CaMnO3 oxide can be considered a promising candidate for high temperature thermochemical heat storage, since it is able to release oxygen in a wide temperature range (800-1000 °C) at different oxygen partial pressures (pO2) suitable for Concentrated Solar Power (CSP) plants. Moreover, it is composed of earth abundant, inexpensive, non-toxic elements. However, it undergoes decomposition at pO2<0.01 atm and at temperature above 1100 °C. In order to overcome this limitation and to extent the operating temperature range, in this study B-site doping with Fe was used as approach for preventing decomposition. The reaction enthalpy was measured through equilibrium non-stoichiometry curves so that the heat storage capacity could be evaluated. It was demonstrated that Fe-doping prevented CaMnO3 decomposition up to 1200 °C at pO2=0.008 thus widening the operating temperature range and the oxygen reduction extent. In addition, the heat storage capacity (ΔH (kJ/molABO3)) of Fe-CaMnO3 (∼324 kJ/kgABO3) is remarkably higher than that of the un-doped CaMnO3 (∼250 kJ/kgABO3).

Original languageEnglish (US)
Title of host publicationSolarPACES 2018
Subtitle of host publicationInternational Conference on Concentrating Solar Power and Chemical Energy Systems
EditorsChristoph Richter
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418660
DOIs
StatePublished - Jul 25 2019
Event24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018 - Casablanca, Morocco
Duration: Oct 2 2018Oct 5 2018

Publication series

NameAIP Conference Proceedings
Volume2126
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference24th SolarPACES International Conference on Concentrating Solar Power and Chemical Energy Systems, SolarPACES 2018
CountryMorocco
CityCasablanca
Period10/2/1810/5/18

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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