Crystal growth of ionic semiclathrate hydrate formed at interface between CO2+N2 gas mixture and tetrabutylammonium bromide aqueous solution
Crystal growth of ionic semiclathrate hydrate formed at interface between CO2+N2 gas mixture and tetrabutylammonium bromide aqueous solution
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DOI：
10.1007/s11814-016-0035-4
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发表时间：
2016-04
影响因子：
2.7
通讯作者：
Hiroaki Hayama;Hotaka Akiba;Y. Asami;R. Ohmura
中科院分区：
文献类型：
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作者：
Hiroaki Hayama;Hotaka Akiba;Y. Asami;R. Ohmura
本研究报告的视觉观察的离子半笼状水合物的形成和增长的四丁基溴化铵（TBAB）水溶液和CO2+ N2气体混合物的表面。CO2+ N2气体混合物的组成为20：80。实验温度范围为280 ~ 290 K，压力为2.3MPa和4.7MPa，wTBAB=0.10和wTBAB=0.40，其中wTBAB为TBAB在水溶液中的质量分数。在wTBAB=0.40时，最初观察到水合物晶体在液滴内生长，然后在液滴表面横向生长;但在wTBAB=0.10时，水合物晶体仅在液相中生长，不覆盖液滴表面。清楚地观察到两种不同类型的具有不同尺寸的不同晶体。
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+N2gas mixture. The composition of CO2+N2gas 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 wTBAB=0.10 and wTBAB=0.40, where wTBAB denotes the mass fraction of TBAB in the aqueous solution. At wTBAB=0.40, the hydrate crystals were initially observed to grow within the droplet, and followed by lateral growth at the droplet surface; but at wTBAB=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.