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天然气地球科学 ›› 2008, Vol. 19 ›› Issue (4): 577–580.doi: 10.11764/j.issn.1672-1926.2008.04.577

• 天然气水合物 • 上一篇    

冰颗粒粒径对冰点以下甲烷水合物自保护效应的影响

 展静, 吴青柏, 蒋观利   

  1. （中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室，甘肃 兰州 730000）
  • 出版日期:2008-04-20 发布日期:2008-04-20
  • 作者简介:第一作者 E-mail:zhangjing@lzb.ac.cn
  • 基金资助:

    国家自然科学基金项目（编号：4047006）；国家自然科学基础人才培养基金冰川冻土学特殊学科点（编号：J0630966）

Effect of Particle Size of Ice on Methane Hydrate Self-Preservation below Freezing Point

 ZHAN  Jing, TUN  Jing-Bai, JIANG  Guan-Li   

  1. (State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou 730000 China)
  • Online:2008-04-20 Published:2008-04-20

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摘要：

针对冰颗粒粒径对甲烷水合物自保护效应的影响问题，开展了6种冰颗粒粒径和2个温度条件下的甲烷水合物分解实验，分析了不同粒径的冰颗粒对甲烷水合物分解气体体积、分解速率及对甲烷水合物自保护效应的影响。结果表明，冰颗粒的大小对甲烷水合物的分解有明显的影响，甲烷水合物分解速率和体积与冰粒径成反比，冰颗粒越小，甲烷水合物分解速率越大，这一特征在甲烷水合物的分解初期表现得尤为显著；较大冰颗粒所形成的甲烷水合物具有更强的自保护效应。

关键词: 甲烷水合物, 自保护效应, 分解, 粒径

Abstract:

To study the impacts of the ice particle size on the self preservation of methane hydrate, the dissociation experiment of methane hydrates were carried out. It contains six different sizes of ice particles under two different temperatures, aiming at analyzing the impacts of the total release volume of methane and the dissociation rate on the self preservation time. The results show that the size of the ice particle had evident impacts on the dissociation of methane hydrates. The total release volume of methane and the dissociation rate were inversely proportional to the ice particle size, the smaller the ice particle size, the faster the dissociation rate. This feature was very remarkable at the beginning of the dissociation. And, the methane hydrate formed by the bigger size of ice particle had more effective self\|preservation.
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Key words: Methane hydrate, Self preservation, Dissociation, Particle size.

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