Methane hydrate formation comparisons in media with and
without a water source supply |
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| Authors: | Peng Zhang and QingBai Wu |
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| Institution: | State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research
Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research
Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China |
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| Abstract: | Water is a necessary element during gas hydrate formations. Therefore, by analyzing water depletion changes in media, the
reaction characteristics of methane hydrate in media can be studied. In this study, two water sources supplying some liquid
water which may be consumed by the methane hydrate formation reactions were designed and assembled. Using them, the
full formation processes of methane hydrate was studied. Experimental results show the following: If heat released from
nucleation reaction of methane hydrate is diffused rapidly, the nucleation ratios will be enhanced discernibly. While the
hydrate is formed, a force is generated that sucks fresh water from the source into the vicinity of the hydrate, slowing down
the cementation process and causing some hydrate grain dissociation. As a result of cementation differences, the hydrate
reaction processes with different water sources present linear or quadratic equation characteristics. After a few repeated
dissociation and formation processes of some hydrate grains caused by the fresh water, the gas amounts contained in hydrate
will be significantly enhanced. |
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| Keywords: | water source water transfer methane hydrate formation process |
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