title: Solar Thermochemical Energy Storage Through Carbonation Cycles of SrCO3/SrO Supported on SrZrO3.
abstract: 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.
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: Nathan R
authors.initials: NR
authors.lastname: Rhodes
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: Amey
authors.initials: A
authors.lastname: Barde
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: Kelvin
authors.initials: K
authors.lastname: Randhir
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: Like
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: David W
authors.initials: DW
authors.lastname: Hahn
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: Renwei
authors.initials: R
authors.lastname: Mei
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA.
authors.forename: James F
authors.initials: JF
authors.lastname: Klausner
authors.affiliation: School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvalis, OR, 97331, USA.
authors.forename: Nick
authors.identifier: http://orcid.org/0000-0001-5993-5968
authors.initials: N
authors.lastname: AuYeung
mesh_terms: D002254:Carbonates / Q000737:chemistry*; D007700:Kinetics; D010087:Oxides / Q000737:chemistry*; D012993:Solar Energy; D013324:Strontium / Q000737:chemistry*; D013696:Temperature; D015040:Zirconium / Q000737:chemistry*
chemical_list: D002254:Carbonates; D010087:Oxides; C054286:strontium carbonate; D015040:Zirconium; D013324:Strontium
keywords: concentrated solar power; energy storage; reactive stability; strontium oxide