View in EDS

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

Saved in:
Bibliographic Details
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
Description
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]
ISSN:01407007
DOI:10.1016/j.ijrefrig.2026.02.015