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Characteristics of sulfur hexafluoride hydrate film growth at the vapor/liquid interface

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2010, 20(2), pp.85-92
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

김민수 1 Hyun Joo Lee 1 Boram Lee 2 이윤석 3 이은경 4 이주동 5 KIM YANGDO 1

1부산대학교
2포항공과대학교 화학공학과
3부산대학교 재료공학부
4부산대학교 재료공학과
5한국생산기술연구원

Accredited

ABSTRACT

SF6 gas has been widely used in many industrial fields as insulating, cleaning and covering gases due to its outstanding arc-extinguishing and insulating properties. However, global warming potential of SF6 gas is 23,900 times more than that of CO2 and it remains in the air during 3,200 years. For these reason, technological and economical effects could be expected for the separation of SF6 from gas mixtures by hydrate forming process. In this study, we carried out morphological studies for the SF6 hydrate crystal to understand its formation and growth mechanisms. SF6 hydrate film was initially formed at the interfacial boundary between gas and liquid regions, and then subsequent dendrite crystals growth was observed. The dendrite crystals grew to the direction of gas region probably due to the guest gas concentration gradient. The detailed growth characteristics of SF6 hydrate crystals such as nucleation, migration, growth and interference were discussed in this study.

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