Phase equilibria for the ionic semiclathrate hydrate formed with tetrabutylphosphonium chloride plus CO2, CH4, or N 2

Kento Iino, Yusuke Sakakibara, Takuya Suginaka, Ryo Ohmura

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16 Citations (Scopus)

Abstract

This paper presents the phase equilibrium conditions for the semiclathrate hydrates in the systems of (CO2, CH4 or N2 + tetrabutylphosphonium chloride + water). The experiments were performed by isochoric method within the range of temperature from (283.0 to 291.8) K and pressure from (0.19 to 5.02) MPa with mass fraction of tetrabutylphosphonium chloride aqueous solution 0.36. The presence of tetrabutylphosphonium chloride increases the phase equilibrium temperatures of CO2, CH4 or N2 hydrates by at least 8 K at a given pressure. The gas separation performance in tetrabutylphosphonium chloride hydrate systems was compared with that in other semiclathrate hydrate systems, based on the measured phase equilibrium conditions.

Original languageEnglish
Pages (from-to)133-136
Number of pages4
JournalJournal of Chemical Thermodynamics
Volume71
DOIs
Publication statusPublished - 2014 Apr 1

Keywords

  • Clathrate hydrates
  • Phase equilibrium
  • Semiclathrate hydrates
  • Tetrabutylphosphonium chloride

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

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