Phase equilibrium for clathrate hydrates formed with difluoromethane or krypton, each coexisting with propan-2-ol, 2-methyl-2-propanol, or 2-propanone

Shuntaro Imai, Kumiko Miyake, Ryo Ohmura, Yasuhiko H. Mori

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This paper presents phase-equilibrium pressure-temperature data for the clathrate hydrates formed in six three-component systems each consisting of a hydrate-forming gas, a water-soluble freezing-point depression material, and water. These systems are difluoromethane + propan-2-ol + water, difluoromethane -(- 2-methyl-2-propanol + water, difluoromethane + 2-propanone + water, krypton + propan-2-ol + water, krypton + 2-methyl-2-propanol + water, and krypton + 2-propanone + water. The temperature range over which the phase-equilibrium measurements were performed using each system extended to (268.65 to 266.75) K on the lower side and (284.05 to 293.35) K on the higher side. The phase-equilibrium temperatures in the three difluoromethane-containing systems were found to be lower than that in the binary difluoromethane + water system at the same system pressure above 0.2 MPa at which the equilibrium temperature in the binary system is nearly 275 K. On the contrary, the phase-equilibrium temperatures in the three krypton-containing systems were found to be substantially higher than that in the binary krypton + water system throughout the measurement range for each system.

Original languageEnglish
Pages (from-to)1056-1059
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume52
Issue number3
DOIs
Publication statusPublished - 2007 May 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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