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Adapting the MgO-CO2 Working Pair for Thermochemical Energy Storage by Doping with Salts: Effect of the (LiK)NO3 Content Full article

Conference Heat Powered Cycles Conference
16-19 Sep 2018 , Bayreuth
Journal Energies
ISSN: 1996-1073
Output data Year: 2019, Volume: 12, Number: 11, Article number : 2262, Pages count : 13 DOI: 10.3390/en12122262
Tags Eutectic mixture; Magnesium carbonate; Magnesium oxide; Salt modification; Thermochemical energy storage
Authors Kim Seon Tae 1 , Miura Haruka 1 , Takasu Hiroki 1 , Kato Yukitaka 1 , Shkatulov Alexandr 2 , Aristov Yuri 1,3
Affiliations
1 Tokyo Institute of Technology, 2-12-1-N1-22, Ōokayama, Meguro-ku, Tokyo, 152-8550, Japan
2 Department of Applied Physics, Eindhoven University of Technology, De Rondom 70, AP Eindhoven, 5612, Netherlands
3 Boreskov Institute of Catalysis, Ac. Lavrentiev av. 5, Novosibirsk, 630090, Russian Federation

Funding (1)

1 Tokyo Institute of Technology

Abstract: The MgO-CO2 working pair has been regarded as prospective for thermochemical energy storage (TCES) due to its relatively high heat storage capacity, low cost, and wide availability. This study is aimed at the optimization of the molar salt content, α, for the MgO modified with the eutectic mixture of LiNO3 and KNO3 (Li0.42K0.58NO3) which was earlier shown to provide high conversion, ∆x, in heat-storage/release processes at 300–400 ◦C. The composites that have different salt content were prepared and carbonation kinetics was investigated under various conditions (carbonation temperature, Tcarb., is 290–360 ◦C and CO2 pressure, P(CO2), is 50–101 kPa). Significant accelerating effect was revealed at α ≥ 0.05, and the ∆x value was maximized at α = 0.10–0.20. The largest conversion of 0.70 was detected at α = 0.10 and Tcarb. = 350 ◦C that corresponds to the specific useful heat (Qcomp.) is 1.63 MJ/kg-composite. However, the salt content of 0.20 ensures the high conversion, ∆x = 0.63–0.67 and Qcomp. = 1.18–1.25 MJ/kg-composite in the whole temperature range between 290 and 350 ◦C. The (LiK)NO3/MgO composite with an optimal salt content of 0.20 exhibits reasonable durability through cyclic experiment at 330 ◦C, namely, the stabilized reacted conversion ∆x = 0.34 (Qcomp. = 0.64 MJ/kg-composite). The studied (Li0.42K0.58)NO3 promoted MgO-CO2 working pair has good potential as thermochemical storage material of middle temperature heat (300–400 ◦C). © 2019 by the authors.
Cite: Kim S.T. , Miura H. , Takasu H. , Kato Y. , Shkatulov A. , Aristov Y.
Adapting the MgO-CO2 Working Pair for Thermochemical Energy Storage by Doping with Salts: Effect of the (LiK)NO3 Content
Energies. 2019. V.12. N11. 2262 :1-13. DOI: 10.3390/en12122262 WOS Scopus РИНЦ ANCAN OpenAlex
Files: Full text from publisher
Dates:
Submitted: Apr 30, 2019
Published print: Jun 1, 2019
Accepted: Jun 11, 2019
Published online: Jun 13, 2019
Identifiers:
Web of science: WOS:000473821400035
Scopus: 2-s2.0-85067251712
Elibrary: 41634904
Chemical Abstracts: 2019:1932795
Chemical Abstracts (print): 172:77410
OpenAlex: W2950762891
Citing:
DB Citing
Scopus 11
Web of science 11
Elibrary 7
OpenAlex 11
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