Clathrate hydrate formation in (methane + water + methylcyclohexanone) systems: The first phase equilibrium data

Ryo Ohmura, Tsutomu Uchida, Satoshi Takeya, Jiro Nagao, Hideki Minagawa, Takao Ebinuma, Hideo Narita

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The present study experimentally demonstrated clathrate hydrate formation in the systems of (methane + water + each of the three methylcyclohexanone isomers, i.e., 2-methylcyclohexa-none, 3-methylcyclohexanone, and 4-methylcyclohexanone) and measured the first data of the quadruple (water rich liquid + hydrate + methylcyclohexanone rich liquid + methane rich vapor) equilibrium pressure and temperature conditions in these systems over the temperatures from T = 273 K to T = 281 K. In the three systems with methylcyclohexanone, the measured equilibrium pressure at each given temperature is ∼1.3 MPa lower than that in a structure-I hydrate forming (methane + water) system without any methylcyclohexanone, which suggests the formation of structure-H hydrates with methylcyclohexanones as large-molecule guest substances. Among the three systems, 3-methylcyclohexanone provides the highest equilibrium pressure, and 2-methylcyclohexanone, the lowest.

Original languageEnglish
Pages (from-to)2045-2054
Number of pages10
JournalJournal of Chemical Thermodynamics
Volume35
Issue number12
DOIs
Publication statusPublished - 2003 Dec
Externally publishedYes

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clathrates
Methane
Hydrates
Phase equilibria
hydrates
methane
Water
water
Liquid methane
liquids
Isomers
Temperature
temperature
isomers
Vapors
vapors
Molecules
Liquids
molecules

Keywords

  • Clathrate hydrate
  • Gas hydrate
  • Methane
  • Methylcyclohexanone
  • Phase equilibria
  • Structure-H hydrate

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Clathrate hydrate formation in (methane + water + methylcyclohexanone) systems : The first phase equilibrium data. / Ohmura, Ryo; Uchida, Tsutomu; Takeya, Satoshi; Nagao, Jiro; Minagawa, Hideki; Ebinuma, Takao; Narita, Hideo.

In: Journal of Chemical Thermodynamics, Vol. 35, No. 12, 12.2003, p. 2045-2054.

Research output: Contribution to journalArticle

Ohmura, Ryo ; Uchida, Tsutomu ; Takeya, Satoshi ; Nagao, Jiro ; Minagawa, Hideki ; Ebinuma, Takao ; Narita, Hideo. / Clathrate hydrate formation in (methane + water + methylcyclohexanone) systems : The first phase equilibrium data. In: Journal of Chemical Thermodynamics. 2003 ; Vol. 35, No. 12. pp. 2045-2054.
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AB - The present study experimentally demonstrated clathrate hydrate formation in the systems of (methane + water + each of the three methylcyclohexanone isomers, i.e., 2-methylcyclohexa-none, 3-methylcyclohexanone, and 4-methylcyclohexanone) and measured the first data of the quadruple (water rich liquid + hydrate + methylcyclohexanone rich liquid + methane rich vapor) equilibrium pressure and temperature conditions in these systems over the temperatures from T = 273 K to T = 281 K. In the three systems with methylcyclohexanone, the measured equilibrium pressure at each given temperature is ∼1.3 MPa lower than that in a structure-I hydrate forming (methane + water) system without any methylcyclohexanone, which suggests the formation of structure-H hydrates with methylcyclohexanones as large-molecule guest substances. Among the three systems, 3-methylcyclohexanone provides the highest equilibrium pressure, and 2-methylcyclohexanone, the lowest.

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