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Stabilization of molten salt materials using metal chlorides for solar thermal storage

T. O. Dunlop, D. J. Jarvis, W. E. Voice, J. H. Sullivan, James Sullivan Orcid Logo

Scientific Reports, Volume: 8, Issue: 1

Swansea University Author: James Sullivan Orcid Logo

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DOI (Published version): 10.1038/s41598-018-26537-8

Abstract

The effect of a variety of metal-chlorides additions on the melting behavior and thermal stability of commercially available salts was investigated. Ternary salts comprised of KNO3, NaNO2, and NaNO3 were produced with additions of a variety of chlorides (KCl, LiCl, CaCl2, ZnCl2, NaCl and MgCl2). The...

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Published in: Scientific Reports
ISSN: 2045-2322
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa40539
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first_indexed 2018-05-31T19:03:59Z
last_indexed 2018-08-07T12:53:54Z
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spelling 2018-08-07T10:42:56.1317814 v2 40539 2018-05-31 Stabilization of molten salt materials using metal chlorides for solar thermal storage 40e32d66748ab74184a31207ab145708 0000-0003-1018-773X James Sullivan James Sullivan true false 2018-05-31 MTLS The effect of a variety of metal-chlorides additions on the melting behavior and thermal stability of commercially available salts was investigated. Ternary salts comprised of KNO3, NaNO2, and NaNO3 were produced with additions of a variety of chlorides (KCl, LiCl, CaCl2, ZnCl2, NaCl and MgCl2). Thermogravimetric analysis and weight loss experiments showed that the quaternary salt containing a 5 wt% addition of LiCl and KCl led to an increase in short term thermal stability compared to the ternary control salts. These additions allowed the salts to remain stable up to a temperature of 630 °C. Long term weight loss experiments showed an upper stability increase of 50 °C. A 5 wt% LiCl addition resulted in a weight loss of only 25% after 30 hours in comparison to a 61% loss for control ternary salts. Calorimetry showed that LiCl additions allow partial melting at 80 °C, in comparison to the 142 °C of ternary salts. This drop in melting point, combined with increased stability, provided a molten working range increase of almost 100 °C in total, in comparison to the control ternary salts. XRD analysis showed the oxidation effect of decomposing salts and the additional phase created with LiCl additions to allow melting point changes to occur. Journal Article Scientific Reports 8 1 2045-2322 29 5 2018 2018-05-29 10.1038/s41598-018-26537-8 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2018-08-07T10:42:56.1317814 2018-05-31T13:56:59.4909406 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering T. O. Dunlop 1 D. J. Jarvis 2 W. E. Voice 3 J. H. Sullivan 4 James Sullivan 0000-0003-1018-773X 5 0040539-31052018140004.pdf dunlop2018.pdf 2018-05-31T14:00:04.4000000 Output 1244379 application/pdf Version of Record true 2018-05-31T00:00:00.0000000 true eng
title Stabilization of molten salt materials using metal chlorides for solar thermal storage
spellingShingle Stabilization of molten salt materials using metal chlorides for solar thermal storage
James Sullivan
title_short Stabilization of molten salt materials using metal chlorides for solar thermal storage
title_full Stabilization of molten salt materials using metal chlorides for solar thermal storage
title_fullStr Stabilization of molten salt materials using metal chlorides for solar thermal storage
title_full_unstemmed Stabilization of molten salt materials using metal chlorides for solar thermal storage
title_sort Stabilization of molten salt materials using metal chlorides for solar thermal storage
author_id_str_mv 40e32d66748ab74184a31207ab145708
author_id_fullname_str_mv 40e32d66748ab74184a31207ab145708_***_James Sullivan
author James Sullivan
author2 T. O. Dunlop
D. J. Jarvis
W. E. Voice
J. H. Sullivan
James Sullivan
format Journal article
container_title Scientific Reports
container_volume 8
container_issue 1
publishDate 2018
institution Swansea University
issn 2045-2322
doi_str_mv 10.1038/s41598-018-26537-8
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description The effect of a variety of metal-chlorides additions on the melting behavior and thermal stability of commercially available salts was investigated. Ternary salts comprised of KNO3, NaNO2, and NaNO3 were produced with additions of a variety of chlorides (KCl, LiCl, CaCl2, ZnCl2, NaCl and MgCl2). Thermogravimetric analysis and weight loss experiments showed that the quaternary salt containing a 5 wt% addition of LiCl and KCl led to an increase in short term thermal stability compared to the ternary control salts. These additions allowed the salts to remain stable up to a temperature of 630 °C. Long term weight loss experiments showed an upper stability increase of 50 °C. A 5 wt% LiCl addition resulted in a weight loss of only 25% after 30 hours in comparison to a 61% loss for control ternary salts. Calorimetry showed that LiCl additions allow partial melting at 80 °C, in comparison to the 142 °C of ternary salts. This drop in melting point, combined with increased stability, provided a molten working range increase of almost 100 °C in total, in comparison to the control ternary salts. XRD analysis showed the oxidation effect of decomposing salts and the additional phase created with LiCl additions to allow melting point changes to occur.
published_date 2018-05-29T03:51:35Z
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score 11.016235

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