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Crystal growth studies of SF6 clathrate hydrate

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2009, 19(5), pp.228-236
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

이윤석 1 이주동 2 Seog-Young Yoon 1 KIM YANGDO 1 이보람 3 이현주 1 이은경 1 Sumin Kim 1 김영석 2

1부산대학교
2한국생산기술연구원
3포항공과대학교

Accredited

ABSTRACT

In this study, we investigated morphological characteristics of SF6 clathrate hydrate crystals to understand its formation and growth mechanism. SF6 clathrate hydrate crystals were formed in high-pressure reaction cell charged with pure water and SF6 gas at constant pressure and temperature. Two-phase (SF6 gas/aqueous solution) and three-phase (SF6 gas/aqueous solution/SF6 liquid) conditions were investigated. In both conditions, dendritic shape hydrate crystals were grown as like fibriform crystals along upward growth direction at the gas/aqueous solution interface. In the case of the reaction process of three-phase condition, when the SF6 gas bubbles which were generated in SF6 liquid phase due to the reduction of reaction cell pressure stuck to the gas/aqueous interfaces, the hydrate phase were appeared at the surface of the bubbles. This paper presents the detail growth characteristics of SF6 hydrate crystals including crystal nucleation, migration, growth and interference.

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