Phase equilibrium temperature and dissociation heat of ionic semiclathrate hydrate formed with tetrabutylammonium butyrate

Yuji Yamauchi, Yuta Arai, Tatsuro Yamasaki, Fuyuaki Endo, Atsushi Hotta, Ryo Ohmura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper reports the phase equilibrium temperature and dissociation heat of ionic semiclathrate hydrate formed with tetrabutylammonium butyrate (TBABu). The temperature - composition phase diagram of the TBABu hydrate was determined in the mass fraction from 0.10 to 0.44. The highest equilibrium temperature of TBABu hydrate was 15.4 °C in the mass fraction range from 0.35 to 0.37. On the dissociation heat of DSC measurements, a single heat flow peak of TBABu hydrate excluding ice melting peak was observed at all the mass fraction systems. The largest dissociation heat was 184.9 ± 3.1 kJ/kg at the mass fraction 0.36. TBABu hydrate could potentially be used as a thermal energy storage material.

Original languageEnglish
JournalFluid Phase Equilibria
DOIs
Publication statusAccepted/In press - 2016 Oct 31

Keywords

  • Clathrate hydrate
  • Dissociation heat
  • Ionic semiclathrate hydrate
  • Phase equilibria
  • Tetrabutylammonium butyrate

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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