Phase equilibrium for structure H hydrates formed with methane plus cycloheptane, cycloheptanone, or oxacycloheptane

Takahiro Kozaki, Tatsuhiko Taguchi, Satoshi Takeya, Ryo Ohmura

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Pressure and temperature conditions for the four-phase equilibrium in systems that include liquid water, structure H hydrate, methane gas, and liquid hydrocarbon substances (cycloheptane, cycloheptanone, or oxacycloheptane) were measured over the temperature range (273.5 to 284.1) K. The measurements indicate that, at 274 K, the equilibrium pressures of the systems with cycloheptane, cycloheptanone, and oxacycloheptane were lower by (1.6, 1.3, and 1.5) MPa, respectively, than those of the structure I methane hydrates in equilibrium with liquid water and methane vapor. Powder X-ray diffraction measurements of the formed hydrate samples confirmed structure H hydrates.

Original languageEnglish
Pages (from-to)3059-3062
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume55
Issue number9
DOIs
Publication statusPublished - 2010 Sep 9

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Methane
Hydrates
Phase equilibria
Liquids
Water
Hydrocarbons
X ray powder diffraction
Gases
Vapors
Hydrogen
Temperature
cycloheptanone

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Phase equilibrium for structure H hydrates formed with methane plus cycloheptane, cycloheptanone, or oxacycloheptane. / Kozaki, Takahiro; Taguchi, Tatsuhiko; Takeya, Satoshi; Ohmura, Ryo.

In: Journal of Chemical and Engineering Data, Vol. 55, No. 9, 09.09.2010, p. 3059-3062.

Research output: Contribution to journalArticle

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