The Effects of Cooling Rate and Particle Size of Medium to the Formation of Methane hydrate in Sands
Received date: 2011-02-22
Revised date: 2011-05-09
Online published: 2011-10-10
For study the effects of cooling rate and particle size of medium to the formation of natural gas hydrate, we conduct the formation experiments of methane hydrate in fine and coarse sands.Five cooling rates are applied to the formation processes.The result shows that the cooling rate affects the nucleation time of methane hydrate in coarse sand obviously.The faster the cooling rate, the shorter the nucleation time.Meanwhile, the slower the cooling rate, the higher the methane gas conversion rate.And the cooling rate also affects the formations both in cooling process and constant temperature process.Under a slower cooling rate, the methane gas conversion rate in constant temperature process is relatively small.Different medium has obvious effect to the formation of methane hydrate within it.Relatively, under same conditions, methane hydrate forms easier in coarse sand than in fine sand; and the gas conversion rate in coarse sand is higher than that in fine sand.
JIANG Guan-Li, WU Qing-Bai, ZHAN Jing . The Effects of Cooling Rate and Particle Size of Medium to the Formation of Methane hydrate in Sands[J]. Natural Gas Geoscience, 2011 , 22(5) : 920 -925 . DOI: 10.11764/j.issn.1672-1926.2011.05.920
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