Crystal growth of ionic semiclathrate hydrate formed at interface between CO2+N2 gas mixture and tetrabutylammonium bromide aqueous solution

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• 作者：Hiroaki Hayama ; Hotaka Akiba ; Yuki Asami…
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：33
• 期：6
• 页码：1942-1947
• 全文大小：1,321 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220
• 卷排序：33

文摘

This study reports a visual observation of the formation and growth of ionic semiclathrate hydrate on the surface of a Tetrabutylammonium bromide (TBAB) aqueous solution and CO₂+N₂ gas mixture. The composition of CO₂+N₂ gas mixture was 20: 80. The experimental temperature range was from 280 K to 290 K, under the pressures of 2.3MPa and 4.7MPa, at w_TBAB=0.10 and w_TBAB=0.40, where wTBAB denotes the mass fraction of TBAB in the aqueous solution. At w_TBAB=0.40, the hydrate crystals were initially observed to grow within the droplet, and followed by lateral growth at the droplet surface; but at w_TBAB=0.10, the hydrate crystals grew exclusively in the liquid phase and did not cover the droplet surface. Two types of different crystals with different sizes were clearly observed.KeywordsClathrate HydrateCrystal GrowthCarbon CaptureCrystal MorphologyTetrabutylammonium Bromide