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

36 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

Keywords

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

ASJC Scopus subject areas

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

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