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

Autor: Rhodes NR; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Barde A; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Randhir K; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Li L; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Hahn DW; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Mei R; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., Klausner JF; Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611, USA., AuYeung N; School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvalis, OR, 97331, USA.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2015 Nov; Vol. 8 (22), pp. 3793-8. Date of Electronic Publication: 2015 Oct 05.
DOI: 10.1002/cssc.201501023
Abstrakt: 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.
(© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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