Thermodynamic Properties of Ionic Semiclathrate Hydrate Formed with Tetrabutylammonium Propionate

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

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The phase equilibrium temperature and dissociation heat of tetrabutylammonium propionate (TBAPr) hydrate are reported. TBAPr hydrate is a type of ionic semiclathrate hydrates and also could potentially be used as thermal energy storage material. The temperature-composition phase diagram of the TBAPr hydrate was determined in a defined range of mass fractions. Considering the dissociation heat of differential scanning calorimetry (DSC) measurements, multiple peaks of heat flow were observed in the TBAPr-water system at the TBAPr mass fraction lower than 0.35, and there was a single peak at the mass fraction higher than 0.37.

Original languageEnglish
JournalChemical Engineering and Technology
Publication statusAccepted/In press - 2017


  • Clathrate hydrate
  • Dissociation heat
  • Phase equilibria
  • Tetrabutylammonium propionate

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering


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