天然气水合物

冰颗粒粒径对冰点以下甲烷水合物自保护效应的影响

展开
  • (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)
第一作者 E-mail:zhangjing@lzb.ac.cn

网络出版日期: 2008-04-20

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

Expand
  • (State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou 730000 China)

Online published: 2008-04-20

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。

本文引用格式

展静, 吴青柏, 蒋观利 . 冰颗粒粒径对冰点以下甲烷水合物自保护效应的影响[J]. 天然气地球科学, 2008 , 19(4) : 577 -580 . DOI: 10.11764/j.issn.1672-1926.2008.04.577

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.


参考文献

[1]Sloan E D.Clathrate Hydrate of Natural Gases[M].2nd ed. New York:Marcel Dekker Inc,1998.
[2] Yakushev V S, Istomin V A. Gas-hydrate self-preservation effect
[M]//Maeno N, Hondoh T.Physics and Chemistry of Ice. Sapporo:Hokkaido University Press,1992:136-139.
[3]Handa Y,Stupin D.Thermodynamic properties and dissociation characteristics of methane and propane hydrates in 70--radius silica gel porest
[J].Phyical Chemistry,1992,96:8599-8603.
[4] Davidson D, Garg S, Gough S, Handa Y,et al. Laboratory analysis of a naturally occurring gas hydrate from sediment of the Gulf of Mexico
[J]. Geochim Cosmochim  Acta, 1986, 50:619-623.
[5] Handa Y P. Compositions, enthalpies of dissociation, and heat capacities in the range 85 to 270 K for clathrate hydrates of methane, ethane, and propane, and enthalpy of dissociation of isobutane hydrate, as determined by a heat-flow calorimeter
[J]. Chemical Thermodynamics, 1986, 18: 915-921.
[6]Gudmundsson J S, Parlaktuna M, Levik O I, et al. Laboratory for Continuous Production of Natural Gas Hydrates
[C]. Annals of the New York Academy of Sciences,2000:912,851.
[7] Stern L A, Circone S, Kirby S H,et al. Anomalous preservation of pure methane hydrate at 1 atm
[J]. Journal of Physical Chemistry B, 2001, 105, 1756-1762. [8] Shirota H, Aya I, Namie S, et al. Measurement of methane hydrate dissociation for application to natural gas storage and transportation
[C]//Proceedings of the Fourth International Conference on Gas Hydrates, Yokohama, Japan, 2002:972-977.
[9]林微,陈光进.气体水合物分解动力学研究现状
[J].过程工程学报,2004,4(1):69-74.
[10] Peters D J. A Study of Hydrate Dissociation in Pipelines by the Method of Two-Sided Depressurization:Eperiment and Model
[D].Master of Science Thesis, Colorado School of Mines.1999.

 

文章导航

/