期刊
JOURNAL OF CRYSTAL GROWTH
卷 402, 期 -, 页码 249-259出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2014.06.028
关键词
Interfaces; Gas hydrate; SDS; Kinetic inhibitor; PVCap
资金
- Development of key technology in seawater desalination using gas hydrate process
- Ministry of Oceans and Fisheries, Korea [20110141]
- Korea Institute of Industrial Technology and Korea government Ministry of Trade, Industry and Energy [N0000502]
- Ministry of Public Safety & Security (MPSS), Republic of Korea [N0000502] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The characteristics of methane-propane hydrate crystal growth on the surface of gas bubble in pure water were investigated using optical microscope and compared with those in aqueous solutions of sodium dodecyl sulfate (SOS) or poly-N-vinylcaprolactam (PVCap). Most of morphology works in literature mainly focused on the hydrate crystal growth at the gas/water interface or surface of water droplets. However, this study monitors crystal growth at the bubble surface. In the case of pure water, smooth hydrate film was formed initially and the film surface on the bubble became rough as experiment proceeded. It was also observed that the hydrate crystals developed as the dendritic shape from the surface of hydrate film. In the presence of SOS, drastic changes in morphology were observed in that smoke-like crystals appeared from the top of the bubble. Besides, the gas bubble was not fully covered by hydrate film when the SOS concentration increased. In the PVCap solution, seed-like or small spot of hydrate crystals occurred sparsely on the bubble surface and spread out the whole surface as experiment progressed. The experimental results showed that the presence of SOS or PVCap affect morphological characteristics of methane-propane hydrate crystal on the surface of gas bubble. K. (C) 2014 Elsevier B.V. All rights reserved
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