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Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage

JACK REYNOLDS, Rhodri Williams, Jonathon Elvins, Eifion Jewell Orcid Logo, Justin Searle Orcid Logo, Xinyuan Ke

Journal of Materials Science, Volume: 58, Issue: 13, Pages: 5610 - 5624

Swansea University Authors: JACK REYNOLDS, Rhodri Williams, Jonathon Elvins, Eifion Jewell Orcid Logo, Justin Searle Orcid Logo

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DOI (Published version): 10.1007/s10853-023-08370-1

Abstract

Thermochemical heat storage is one of the most attractive technologies to store heat from solar thermal energy or waste heat from industrial processes for its high energy density and long-term storage capability. This research presents a novel expanded graphite/alginate polymer matrix encapsulated w...

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Published in: Journal of Materials Science
ISSN: 0022-2461 1573-4803
Published: Springer Science and Business Media LLC 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa62941
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This research presents a novel expanded graphite/alginate polymer matrix encapsulated with hydrated salts as highly efficient thermochemical heat storage materials. Through the simple synthesis method, the composite material can be sized and shaped to fit multiple applications, and be easily scaled where needed. Through the reversible hydration and dehydration reaction, the incorporated CaCl2 salt can store and release heat. Thermal energy from solar thermal generators or low grade waste heat sources (&lt; 200 °C) is appropriate for the dehydration of CaCl2. A salt loading value of 84% has been achieved with visible porosity maintained. Static heat is used to study the charge reaction, whereas a flow of humid air through a packed bed is used to study the discharge reaction where temperature uplifts between 10–14 °C were observed. A vermiculite/CaCl2 composite is used as a comparison in both reactions. Additionally, bulk density, surface porosity, surface area, moisture sorption and thermal conductivity are considered. The results show that the novel composite materials developed in this study can achieve better packing density and comparable energy density comparing to the conventional vermiculite/CaCl2 composite, but with higher thermal conductivity leading to enhanced energy efficiency.</abstract><type>Journal Article</type><journal>Journal of Materials Science</journal><volume>58</volume><journalNumber>13</journalNumber><paginationStart>5610</paginationStart><paginationEnd>5624</paginationEnd><publisher>Springer Science and Business Media LLC</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0022-2461</issnPrint><issnElectronic>1573-4803</issnElectronic><keywords>Thermochemical heat storage, alginate, expanded graphite</keywords><publishedDay>1</publishedDay><publishedMonth>4</publishedMonth><publishedYear>2023</publishedYear><publishedDate>2023-04-01</publishedDate><doi>10.1007/s10853-023-08370-1</doi><url>http://dx.doi.org/10.1007/s10853-023-08370-1</url><notes/><college>COLLEGE NANME</college><CollegeCode>COLLEGE CODE</CollegeCode><institution>Swansea University</institution><apcterm>SU Library paid the OA fee (TA Institutional Deal)</apcterm><funders>The authors would like to thank the Materials and Manufacturing Academy and COATED CDT (COATED M2A) in Swansea University, TATA Steel Colors, Engineering and Physical Sciences Research Council (EPSRC via UKRI) EP/S02252X/1, and the European Social Fund via the Welsh Government (WEFO) (c80816) for supporting the work described in this article. 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spelling v2 62941 2023-03-16 Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage 758941482e9babf19179658cf5f9be14 JACK REYNOLDS JACK REYNOLDS true false 6d4e98ea806b19f32027575aaaf17a87 Rhodri Williams Rhodri Williams true false 8f619d25f6c30f8af32bc634e4775e21 Jonathon Elvins Jonathon Elvins true false 13dc152c178d51abfe0634445b0acf07 0000-0002-6894-2251 Eifion Jewell Eifion Jewell true false 0e3f2c3812f181eaed11c45554d4cdd0 0000-0003-1101-075X Justin Searle Justin Searle true false 2023-03-16 Thermochemical heat storage is one of the most attractive technologies to store heat from solar thermal energy or waste heat from industrial processes for its high energy density and long-term storage capability. This research presents a novel expanded graphite/alginate polymer matrix encapsulated with hydrated salts as highly efficient thermochemical heat storage materials. Through the simple synthesis method, the composite material can be sized and shaped to fit multiple applications, and be easily scaled where needed. Through the reversible hydration and dehydration reaction, the incorporated CaCl2 salt can store and release heat. Thermal energy from solar thermal generators or low grade waste heat sources (< 200 °C) is appropriate for the dehydration of CaCl2. A salt loading value of 84% has been achieved with visible porosity maintained. Static heat is used to study the charge reaction, whereas a flow of humid air through a packed bed is used to study the discharge reaction where temperature uplifts between 10–14 °C were observed. A vermiculite/CaCl2 composite is used as a comparison in both reactions. Additionally, bulk density, surface porosity, surface area, moisture sorption and thermal conductivity are considered. The results show that the novel composite materials developed in this study can achieve better packing density and comparable energy density comparing to the conventional vermiculite/CaCl2 composite, but with higher thermal conductivity leading to enhanced energy efficiency. Journal Article Journal of Materials Science 58 13 5610 5624 Springer Science and Business Media LLC 0022-2461 1573-4803 Thermochemical heat storage, alginate, expanded graphite 1 4 2023 2023-04-01 10.1007/s10853-023-08370-1 http://dx.doi.org/10.1007/s10853-023-08370-1 COLLEGE NANME COLLEGE CODE Swansea University SU Library paid the OA fee (TA Institutional Deal) The authors would like to thank the Materials and Manufacturing Academy and COATED CDT (COATED M2A) in Swansea University, TATA Steel Colors, Engineering and Physical Sciences Research Council (EPSRC via UKRI) EP/S02252X/1, and the European Social Fund via the Welsh Government (WEFO) (c80816) for supporting the work described in this article. SEM/EDS were performed using the Advance Imaging of Materials (AIM) facilities at Swansea University, supported by the European Regional Development Fund through the Welsh Government (80708) & EPSRC (EP/M028267/1). 2023-07-10T16:55:30.6000004 2023-03-16T13:16:50.3074647 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering JACK REYNOLDS 1 Rhodri Williams 2 Jonathon Elvins 3 Eifion Jewell 0000-0002-6894-2251 4 Justin Searle 0000-0003-1101-075X 5 Xinyuan Ke 6 62941__27037__9ff54ab7790041d5838bddecb3bc8e4d.pdf 62941.VOR.pdf 2023-04-13T15:06:53.6398136 Output 8876680 application/pdf Version of Record true Distributed under the terms of a Creative Commons Attribution 4.0 License (CC BY 4.0). true eng https://creativecommons.org/licenses/by/4.0/
title Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
spellingShingle Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
JACK REYNOLDS
Rhodri Williams
Jonathon Elvins
Eifion Jewell
Justin Searle
title_short Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
title_full Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
title_fullStr Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
title_full_unstemmed Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
title_sort Development and characterisation of an alginate and expanded graphite based composite for thermochemical heat storage
author_id_str_mv 758941482e9babf19179658cf5f9be14
6d4e98ea806b19f32027575aaaf17a87
8f619d25f6c30f8af32bc634e4775e21
13dc152c178d51abfe0634445b0acf07
0e3f2c3812f181eaed11c45554d4cdd0
author_id_fullname_str_mv 758941482e9babf19179658cf5f9be14_***_JACK REYNOLDS
6d4e98ea806b19f32027575aaaf17a87_***_Rhodri Williams
8f619d25f6c30f8af32bc634e4775e21_***_Jonathon Elvins
13dc152c178d51abfe0634445b0acf07_***_Eifion Jewell
0e3f2c3812f181eaed11c45554d4cdd0_***_Justin Searle
author JACK REYNOLDS
Rhodri Williams
Jonathon Elvins
Eifion Jewell
Justin Searle
author2 JACK REYNOLDS
Rhodri Williams
Jonathon Elvins
Eifion Jewell
Justin Searle
Xinyuan Ke
format Journal article
container_title Journal of Materials Science
container_volume 58
container_issue 13
container_start_page 5610
publishDate 2023
institution Swansea University
issn 0022-2461
1573-4803
doi_str_mv 10.1007/s10853-023-08370-1
publisher Springer Science and Business Media LLC
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
url http://dx.doi.org/10.1007/s10853-023-08370-1
document_store_str 1
active_str 0
description Thermochemical heat storage is one of the most attractive technologies to store heat from solar thermal energy or waste heat from industrial processes for its high energy density and long-term storage capability. This research presents a novel expanded graphite/alginate polymer matrix encapsulated with hydrated salts as highly efficient thermochemical heat storage materials. Through the simple synthesis method, the composite material can be sized and shaped to fit multiple applications, and be easily scaled where needed. Through the reversible hydration and dehydration reaction, the incorporated CaCl2 salt can store and release heat. Thermal energy from solar thermal generators or low grade waste heat sources (< 200 °C) is appropriate for the dehydration of CaCl2. A salt loading value of 84% has been achieved with visible porosity maintained. Static heat is used to study the charge reaction, whereas a flow of humid air through a packed bed is used to study the discharge reaction where temperature uplifts between 10–14 °C were observed. A vermiculite/CaCl2 composite is used as a comparison in both reactions. Additionally, bulk density, surface porosity, surface area, moisture sorption and thermal conductivity are considered. The results show that the novel composite materials developed in this study can achieve better packing density and comparable energy density comparing to the conventional vermiculite/CaCl2 composite, but with higher thermal conductivity leading to enhanced energy efficiency.
published_date 2023-04-01T16:55:25Z
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