Phase equilibrium for ionic semiclathrate hydrate formed with CO2, CH4, or N2 plus tetrabutylphosphonium bromide

Takuya Suginaka, Hiroki Sakamoto, Kento Iino, Yusuke Sakakibara, Ryo Ohmura

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The article describes the equilibrium conditions for the semiclathrate hydrates formed in the following three ternary systems, CO2+tetrabutylphosphonium bromide+water system, CH4+tetrabutylphosphonium bromide+water system, and N2+tetrabutylphosphonium bromide+water system. The experiments were performed at temperatures between 282.6 and 291.6K, at pressures between 0.15 and 5.10MPa with tetrabutylphosphonium bromide aqueous solution of wTBPB=0.35, where wTBPB denotes the mass fraction of tetrabutylphosphonium bromide, respectively. The equilibrium pressure at a given temperature was lower in the order of CO2, CH4 and N2 thereby indicating the possibility of capturing CO2 from the CH4+CO2 and N2+CO2 mixtures.

Original languageEnglish
Pages (from-to)108-111
Number of pages4
JournalFluid Phase Equilibria
Volume344
DOIs
Publication statusPublished - 2013 Apr 25

Fingerprint

Hydrates
Phase equilibria
hydrates
bromides
Water
Ternary systems
water
Temperature
ternary systems
tetrabutylphosphonium
aqueous solutions
Experiments
temperature

Keywords

  • Clathrate hydrates
  • Phase equilibrium
  • Semiclathrate hydrates
  • Tetrabutylphosphonium bromide

ASJC Scopus subject areas

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

Cite this

Phase equilibrium for ionic semiclathrate hydrate formed with CO2, CH4, or N2 plus tetrabutylphosphonium bromide. / Suginaka, Takuya; Sakamoto, Hiroki; Iino, Kento; Sakakibara, Yusuke; Ohmura, Ryo.

In: Fluid Phase Equilibria, Vol. 344, 25.04.2013, p. 108-111.

Research output: Contribution to journalArticle

Suginaka, Takuya ; Sakamoto, Hiroki ; Iino, Kento ; Sakakibara, Yusuke ; Ohmura, Ryo. / Phase equilibrium for ionic semiclathrate hydrate formed with CO2, CH4, or N2 plus tetrabutylphosphonium bromide. In: Fluid Phase Equilibria. 2013 ; Vol. 344. pp. 108-111.
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AU - Iino, Kento

AU - Sakakibara, Yusuke

AU - Ohmura, Ryo

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AB - The article describes the equilibrium conditions for the semiclathrate hydrates formed in the following three ternary systems, CO2+tetrabutylphosphonium bromide+water system, CH4+tetrabutylphosphonium bromide+water system, and N2+tetrabutylphosphonium bromide+water system. The experiments were performed at temperatures between 282.6 and 291.6K, at pressures between 0.15 and 5.10MPa with tetrabutylphosphonium bromide aqueous solution of wTBPB=0.35, where wTBPB denotes the mass fraction of tetrabutylphosphonium bromide, respectively. The equilibrium pressure at a given temperature was lower in the order of CO2, CH4 and N2 thereby indicating the possibility of capturing CO2 from the CH4+CO2 and N2+CO2 mixtures.

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