Phase equilibrium for structure-H hydrate formed with krypton and 2,2-dimethylbutane

Ryo Ohmura, Satoshi Takeya, Tatsuo Maekawa, Tsutomu Uchida

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The temperature and pressure conditions for vapor + liquid + liquid + hydrate four-phase equilibrium in the krypton + 2,2-dimethylbutane + water system have been measured over the temperatures from 273.5 K to 285.6 K. The four-phase equilibrium pressure at a given temperature is lower by 1 MPa to 2.1 MPa than the corresponding equilibrium pressure of structure-II hydrate-forming krypton + water system without 2,2-dimethylbutane. This reduction in the equilibrium pressure due to the addition of 2,2-dimethylbutane suggests the formation of a structure-H hydrate containing krypton as a small-molecule guest and 2,2-dimethylbutane as a large-molecule guest substance. The formation of structure-H hydrate has been confirmed by means of X-ray diffraction measurement.

Original languageEnglish
Pages (from-to)161-163
Number of pages3
JournalJournal of Chemical and Engineering Data
Volume51
Issue number1
DOIs
Publication statusPublished - 2006 Jan
Externally publishedYes

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Krypton
Hydrates
Phase equilibria
Molecules
Water
Liquids
Temperature
Vapors
X ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Phase equilibrium for structure-H hydrate formed with krypton and 2,2-dimethylbutane. / Ohmura, Ryo; Takeya, Satoshi; Maekawa, Tatsuo; Uchida, Tsutomu.

In: Journal of Chemical and Engineering Data, Vol. 51, No. 1, 01.2006, p. 161-163.

Research output: Contribution to journalArticle

Ohmura, Ryo ; Takeya, Satoshi ; Maekawa, Tatsuo ; Uchida, Tsutomu. / Phase equilibrium for structure-H hydrate formed with krypton and 2,2-dimethylbutane. In: Journal of Chemical and Engineering Data. 2006 ; Vol. 51, No. 1. pp. 161-163.
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