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Study on growth characteristics of TBAB clathrate hydrate using directional solidification method.

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Title: Study on growth characteristics of TBAB clathrate hydrate using directional solidification method.
Authors: Takamura, Kazuki1 (AUTHOR), Morimoto, Takashi1 (AUTHOR), Teraoka, Yoshikazu1 (AUTHOR), Kumano, Hiroyuki1 (AUTHOR) kumano@me.aoyama.ac.jp
Source: International Journal of Refrigeration. May2026, Vol. 185, p167-176. 10p.
Subjects: Directional solidification, Crystal growth, Quaternary ammonium salts, Molarity, Crystal morphology, Heat storage, Phase change materials, Solid-liquid interfaces
Abstract: Tetra-n-butyl ammonium bromide (TBAB) is a quaternary ammonium salt whose hydrate has been identified as a promising phase-change material, exhibiting a suitable phase-change temperature for air-conditioning applications. In thermal energy storage systems utilizing TBAB hydrate, the hydrate formation process plays a crucial role in system design. However, the growth rate of TBAB hydrate is known to be significantly slower than that of ice, making it important to reveal the growth characteristics of the hydrate crystals. In this study, the growth behavior of TBAB hydrate crystals was investigated using a directional solidification method. The crystal morphology during solidification was examined, and the temperature at the solid-liquid interface was measured. The results revealed that the crystal morphology was influenced by both the migration speed and the solute concentration. Furthermore, it was found that the interface temperature was lower than the phase-equilibrium temperature of the hydrate and decreased with increasing migration speed. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Refrigeration is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192260943
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Study on growth characteristics of TBAB clathrate hydrate using directional solidification method.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Takamura%2C+Kazuki%22">Takamura, Kazuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morimoto%2C+Takashi%22">Morimoto, Takashi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Teraoka%2C+Yoshikazu%22">Teraoka, Yoshikazu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kumano%2C+Hiroyuki%22">Kumano, Hiroyuki</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kumano@me.aoyama.ac.jp</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Refrigeration%22">International Journal of Refrigeration</searchLink>. May2026, Vol. 185, p167-176. 10p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Directional+solidification%22">Directional solidification</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+growth%22">Crystal growth</searchLink><br /><searchLink fieldCode="DE" term="%22Quaternary+ammonium+salts%22">Quaternary ammonium salts</searchLink><br /><searchLink fieldCode="DE" term="%22Molarity%22">Molarity</searchLink><br /><searchLink fieldCode="DE" term="%22Crystal+morphology%22">Crystal morphology</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+storage%22">Heat storage</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+change+materials%22">Phase change materials</searchLink><br /><searchLink fieldCode="DE" term="%22Solid-liquid+interfaces%22">Solid-liquid interfaces</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Tetra-n-butyl ammonium bromide (TBAB) is a quaternary ammonium salt whose hydrate has been identified as a promising phase-change material, exhibiting a suitable phase-change temperature for air-conditioning applications. In thermal energy storage systems utilizing TBAB hydrate, the hydrate formation process plays a crucial role in system design. However, the growth rate of TBAB hydrate is known to be significantly slower than that of ice, making it important to reveal the growth characteristics of the hydrate crystals. In this study, the growth behavior of TBAB hydrate crystals was investigated using a directional solidification method. The crystal morphology during solidification was examined, and the temperature at the solid-liquid interface was measured. The results revealed that the crystal morphology was influenced by both the migration speed and the solute concentration. Furthermore, it was found that the interface temperature was lower than the phase-equilibrium temperature of the hydrate and decreased with increasing migration speed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Refrigeration is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.ijrefrig.2026.02.015
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 167
    Subjects:
      – SubjectFull: Directional solidification
        Type: general
      – SubjectFull: Crystal growth
        Type: general
      – SubjectFull: Quaternary ammonium salts
        Type: general
      – SubjectFull: Molarity
        Type: general
      – SubjectFull: Crystal morphology
        Type: general
      – SubjectFull: Heat storage
        Type: general
      – SubjectFull: Phase change materials
        Type: general
      – SubjectFull: Solid-liquid interfaces
        Type: general
    Titles:
      – TitleFull: Study on growth characteristics of TBAB clathrate hydrate using directional solidification method.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Takamura, Kazuki
      – PersonEntity:
          Name:
            NameFull: Morimoto, Takashi
      – PersonEntity:
          Name:
            NameFull: Teraoka, Yoshikazu
      – PersonEntity:
          Name:
            NameFull: Kumano, Hiroyuki
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 01407007
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              Value: 185
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            – TitleFull: International Journal of Refrigeration
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