Methane鈥揚ropane Mixed Gas Hydrate Film Growth on the Surface of Water and Luvicap EG Solutions

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• 作者：Reuben Wu ; Karen A. Kozielski ; Patrick G. Hartley ; Eric F. May ; John Boxall ; Nobuo Maeda
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：May 16, 2013
• 年：2013
• 卷：27
• 期：5
• 页码：2548-2554
• 全文大小：302K
• 年卷期：v.27,no.5(May 16, 2013)
• ISSN：1520-5029

文摘

We studied the growth rate of methane鈥損ropane mixed gas hydrate films on the surface of water and up to 3 wt % aqueous solutions of a kinetic hydrate inhibitor, Luvicap EG. The greater the subcooling, the faster the growth rate of the hydrate film on water. Using Mori鈥檚 heat-transfer-limited growth model, we estimated the initial thickness of the hydrate films on water to be between 1.3 and 25 渭m. The addition of Luvicap EG inhibited both the nucleation and the growth of the hydrate films, because we observed that the films on Luvicap EG solutions grew slower and their nucleation required greater subcoolings than those on water. Notably, the hydrate films that grew on Luvicap EG solutions were more transparent and, thus, thinner than those on water. The thinner and yet more slowly growing hydrate films on Luvicap EG solutions suggest that the growth mechanisms had changed from heat-transfer-limited growth to mass-transfer-limited growth.