Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation

Minamikawa, Kazuhiro; Shimada, Jin; Sugahara, Takeshi et al.

Energy and Fuels, 2025, 39(14), 7104-7109

Number of Access:510（2025-07-27 08:56 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/100988

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Title
Tetra-n-butylammonium Tricarboxylate Semiclathrate Hydrates as Phase Change Materials: Phase Equilibrium Relations and Memory Effect in Reformation
Creator
CreatorName
Minamikawa, Kazuhiro
CreatorName
Shimada, Jin
NRID
1000020335384 1000020335384
ORCID
0000-0002-5236-5605 0000-0002-5236-5605
researchmap permalink
read0191169 read0191169
Scopus Author ID
56212469300 56212469300
CreatorName
Sugahara, Takeshi
NRID
1000080208800 1000080208800
ORCID
0000-0003-4747-4919 0000-0003-4747-4919
researchmap permalink
read0013780 read0013780
Scopus Author ID
7402768651 7402768651
CreatorName
Hirai, Takayuki
Description
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Energy and Fuels, © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.energyfuels.5c00502.
Abstract
Semiclathrate hydrates (SCHs), one of the phase change materials for cold energy storage, are crystalline compounds consisting of host water molecules and appropriate guest substances. The typical guest substances of SCHs are tetra-n-butylammonium (TBA) salts. In the present study, we investigated the phase equilibrium relations of (TBA)3 tricarboxylate SCHs, where citrate (−Cit) and 1,2,3-propanetricarboxylate (−123Pro) were used as environmentally friendly tricarboxylate anions. The maximum equilibrium temperatures of (TBA)3-Cit and (TBA)3-123Pro SCHs, whose phase diagrams exhibited a congruent-type phase behavior, were 286.02 ± 0.05 and 286.34 ± 0.05 K, respectively. Their dissociation enthalpies were 186 ± 3 and 193 ± 3 kJ/kg, respectively, which are as large as that of TBA-bromide SCH that has been put to practical use in cold energy storage applications. As an index for suppressing the degree of supercooling in SCH reformation, we have focused on the memory effect. The ability to retain the memory effect in the (TBA)3-Cit and (TBA)3-123Pro SCHs was relatively large. The (TBA)3-Cit and (TBA)3-123Pro SCHs would be superior phase change materials for cold energy storage.
Publisher
American Chemical Society
Source Title
Energy and Fuels
Volume (Issue)
39(14)
Page
7104-7109
Date of Issued
2025-03-26
Language
English
Handle URL
https://hdl.handle.net/11094/100988
PISSN
08870624
eISSN
15205029
Relation.isVersionOf
DOI (Publisher Version)
https://doi.org/10.1021/acs.energyfuels.5c00502
Access Rights
embargoed access
CopyRight
© 2025 American Chemical Society.
The full-text file will be made open to the public on 26 March 2026 in accordance with the publisher's policy.
oaire:version
Accepted Manuscript
Category
学術雑誌論文 Journal Article