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Thermodynamic properties of tetra-n-butylammonium 2-ethylbutyrate semiclathrate hydrate for latent heat storage.

Author(s) : SUGAHARA T., MACHIDA H., MUROMACHI S., et al.

Type of article: Article, IJR article

Summary

The quaternary onium salt-based semiclathrate hydrates have been investigated in many kinds of fields such as latent heat storage materials and gas separation media. In the present study, equilibrium (temperature -composition) relations in the tetra- n -butylammonium 2-ethylbutyrate (TBA-2 EB) semi- clathrate hydrate system have been measured. In addition, thermodynamic and spectroscopic properties of TBA-2 EB semiclathrate hydrate were analyzed. The maximal equilibrium temperature and stoichio- metric concentration of TBA-2 EB semiclathrate hydrate was 283.22 ±0.05 K and x 1 = 0.0281 ±0.0 0 07, respectively. The crystal lattice of TBA-2 EB semiclathrate hydrate, determined by the single crystal X-ray diffraction, was tetragonal. Other properties, not only Raman spectrum but also the maximum allowable degree of supercooling, in the TBA-2 EB semiclathrate hydrate system were similar to those in the tetra- n -butylammonium bromide (TBAB) hydrate. The TBA-2 EB semiclathrate hydrate would be an alternative to TBAB hydrate as a halogen-free semiclathrate hydrate system.

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Pages: 113-119

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Details

  • Original title: Thermodynamic properties of tetra-n-butylammonium 2-ethylbutyrate semiclathrate hydrate for latent heat storage.
  • Record ID : 30026818
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 106
  • Publication date: 2019/10
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2019.06.029

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