Calcium Hydroxide Doped by KNO3 as a Promising Candidate for Thermochemical Storage of Solar Heat Full article
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RSC Advances
ISSN: 2046-2069 |
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| Output data | Year: 2017, Volume: 7, Number: 68, Pages: 42929-42939 Pages count : 11 DOI: 10.1039/C7RA06639B | ||||
| Tags | THERMAL-ENERGY STORAGE; PUMP; DECOMPOSITION; MAGNESIUM; ENHANCEMENT; PERFORMANCE; EFFICIENT; KINETICS; SYSTEMS; NITRATE | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0013 |
| 2 | Russian Foundation for Basic Research | 16-38-00503 |
Abstract:
New materials for thermochemical storage of concentrated solar heat are highly desirable for making this
emerging technology competitive with the traditional sensible and latent heat storage. Keeping this in mind,
we have prepared calcium hydroxide modified with potassium nitrate and studied its de-/rehydration
dynamics by differential scanning calorimetry and thermogravimetry techniques. The following notable
observations are described for the modified Ca(OH)2: (1) an acceleration of the dehydration and
reduction of its temperature as compared with the pure hydroxide; (2) the temperature reduction
depends on the KNO3 content Y and reaches 35 C at Y ¼ 5 wt%; (3) the addition of KNO3 only slightly
reduces the dehydration heat which remains promising for heat storage applications. Fast rehydration of
the doped CaO is observed at T ¼ 290–360 C and P(H2O) ¼ 23–128 mbar, and its rate strongly depends on both temperature and pressure. De- and rehydrated products were studied by the BET analysis and IR-spectroscopy to elucidate possible ways for the salt to influence the Ca(OH)2 dehydration. The mechanism involving a chemical interaction between the salt and the hydroxide is discussed. The new material exhibits a large heat storage density, fast de-/rehydration and adjustable decomposition temperature, and may be considered as a promising candidate for thermochemical storage of concentrated solar energy.
Cite:
Shkatulov A.
, Aristov Y.
Calcium Hydroxide Doped by KNO3 as a Promising Candidate for Thermochemical Storage of Solar Heat
RSC Advances. 2017.
V.7. N68. P.42929-42939. DOI: 10.1039/C7RA06639B
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Calcium Hydroxide Doped by KNO3 as a Promising Candidate for Thermochemical Storage of Solar Heat
RSC Advances. 2017.
V.7. N68. P.42929-42939. DOI: 10.1039/C7RA06639B
WOS
Scopus
РИНЦ
ANCAN
OpenAlex
Files:
Full text from publisher
Dates:
| Submitted: | Jun 14, 2017 |
| Accepted: | Aug 26, 2017 |
| Published online: | Sep 5, 2017 |
Identifiers:
| Web of science: | WOS:000409548200032 |
| Scopus: | 2-s2.0-85029096625 |
| Elibrary: | 31085074 |
| Chemical Abstracts: | 2017:1457473 |
| Chemical Abstracts (print): | 170:67511 |
| OpenAlex: | W2750707504 |