 Stabilization of K2CO3 in vermiculite for thermochemical energy storageA.I. Shkatulov, J. Houben, H. Fischer and H.P. Huinink Renewable Energy, 2020, vol. 150, issue C, 990-1000 Abstract: Thermochemical energy storage (TCES) is an emerging technology promising for domestic applications. Recently, K2CO3 was identified and studied as a TCES material. In this work, the composite “K2CO3 in expanded vermiculite” (69 wt. % of the salt) was prepared and studied for thermochemical energy storage bearing in mind its application for space heating. The hydration rate was found to be higher for the confined K2CO3 in comparison with K2CO3 granules of the same size. While morphology and texture of the composite alter after 74 hydration/dehydration cycles, its chemical composition and average grain size do not change. The energy storage density of the composite bed can reach 0.9 GJ/m3 (250 kWh/m3) for cycles with deliquescence which makes the composite an inexpensive thermochemical material for space heating. Stable conversion for deliquescence conditions was shown for at least 47 cycles. Keywords: Thermochemical energy storage; Sorption heat storage; Potassium carbonate; Salt hydrates; Composites; Vermiculite (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:150:y:2020:i:c:p:990-1000 DOI: 10.1016/j.renene.2019.11.119 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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