Solar Thermochemical Energy Storage Through Carbonation Cycles of SrCO3/SrO Supported on SrZrO3

Nathan R. Rhodes, Amey Barde, Kelvin Randhir, Like Li, David W. Hahn, Renwei Mei, James F. Klausner, Nick Auyeung

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Solar thermochemical energy storage has enormous potential for enabling cost-effective concentrated solar power (CSP). A thermochemical storage system based on a SrO/SrCO3 carbonation cycle offers the ability to store and release high temperature (≈1200 °C) heat. The energy density of SrCO3/SrO systems supported by zirconia-based sintering inhibitors was investigated for 15 cycles of exothermic carbonation at 1150 °C followed by decomposition at 1235 °C. A sample with 40 wt % of SrO supported by yttria-stabilized zirconia (YSZ) shows good energy storage stability at 1450 MJ m-3 over fifteen cycles at the same cycling temperatures. After further testing over 45 cycles, a decrease in energy storage capacity to 1260 MJ m-3 is observed during the final cycle. The decrease is due to slowing carbonation kinetics, and the original value of energy density may be obtained by lengthening the carbonation steps.

Original languageEnglish (US)
Pages (from-to)3793-3798
Number of pages6
Issue number22
StatePublished - Nov 23 2015
Externally publishedYes


  • concentrated solar power
  • energy storage
  • reactive stability
  • strontium oxide

ASJC Scopus subject areas

  • Environmental Chemistry
  • General Chemical Engineering
  • General Materials Science
  • General Energy


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