Phase equilibrium for structure II hydrates formed with methylfluoride coexisting with cyclopentane, fluorocyclopentane, cyclopentene, or tetrahydropyran

Satoshi Takeya, Keita Yasuda, Ryo Ohmura

研究成果: Article査読

18 被引用数 (Scopus)

抄録

This paper reports the pressure-temperature conditions for the vapor + liquid + liquid + hydrate four-phase equilibrium in the systems of methylfluoride and water plus each of the following substances: cyclopentane, fluorocyclopentane, cyclopentene, and tetrahydropyran. The pressure ranges of the present measurements in the four systems are (0.138 to 2.998) MPa at temperatures from (287.9 to 305.9) K in the cyclopentane system, (0.122 to 2.560) MPa at temperatures from (290.1 to 307.0) K in the fluorocyclopentane system, (0.106 to 1.928 MPa) at temperatures from (283.6 to 300.8) K in the cyclopentene system, and (0.116 to 1.877) MPa at temperatures from (284.4 to 301.0) K in the tetrahydropyran system. These equilibrium pressures are lower by at least 0.6 MPa than those in the binary methylfluoride + water system, suggesting the formation of double hydrates with methylfluoride plus cyclopentane, fluorocyclopentane, cyclopentene, or tetrahydropyran. The crystallographic structure of the hydrates is identified to be structure II based on the powder X-ray diffraction measurements.

本文言語English
ページ(範囲)531-534
ページ数4
ジャーナルJournal of Chemical and Engineering Data
53
2
DOI
出版ステータスPublished - 2008 2 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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