Formation Reaction Characteristics of Methane Hydrate in Different Granular Media

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  • 1.State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental andEngineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;2.School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou 730000,China

Received date: 2012-04-13

  Revised date: 2012-06-04

  Online published: 2013-04-10

Abstract

Methane hydrate was formed in the artificial and the natural media which had half-saturated moisture contents and different particle sizes and pore radiuses,and the artificial was chosen as silica gel powder and the natural was chosen as loess.During the reaction processes,the matrix potential values on different positions in the vertical direction of media were measured by three pF-meter probes.According to the measured values,the water depletion rules in the media caused by the methane hydrate formation reactions were calculated and analyzed and the characteristics of methane hydrate formation reactions in media were then studied.Experimental results show that the physical properties of different media-particle size and pore radius can obviously affect formation reaction characteristics of methane hydrate: the formation reaction process of methane hydrate in loess,complying with natural media properties,is perennial and durative,reversely,that in silica gel powder is ephemeral and uniform;during reaction processes,the formation reaction rate within silica gel powder,artificial medium,keeps constant and that within loess,natural medium,slows down as reaction progressing;because methane gas was injected into substrate through reaction cell top,methane diffuses into top layer of substrate fastest and the hydrate formation reaction rate within there was slightly faster than those in both middle and bottom layers;undergoing the same conditions for methane hydrate formation,final water conversion rate in loess is slightly higher than that in silica gel powder.The above comparing result analyses also bring some reference values in geological aspect to us. 

Cite this article

ZHANG Peng,WU Qing-bai,JIANG Guan-li,DONG Lan-feng . Formation Reaction Characteristics of Methane Hydrate in Different Granular Media[J]. Natural Gas Geoscience, 2013 , 24(2) : 265 -272 . DOI: 10.11764/j.issn.1672-1926.2013.02.265

References

[1]Lei Huaiyan,Wang Xianbin,Fang Xuan,et al.Current situation of gas hydrates research and challenges for future[J].Acta Sedimentologica Sinica,1999,17(3):493-498.[雷怀彦,王先彬,房玄,等.天然气水合物研究现状与未来挑战[J].沉积学报,1999,17(3):493-498.]

[2]Fan Shuanshi,Guo Tianmin.Progress in study of clathrate hydrates[J].Chemical Industry and Engineering,1999,18(1):5-10.[樊栓狮,郭天民.笼型水合物研究进展[J].化工进展,1999,18(1):5-10.]

[3]Zheng Junwei,Shi Dou.International natural gas hydrate research and development situation on document counting point of view[J].Natural Gas Geoscience,2005,16(6):825-829.[郑军卫,史斗.从文献计量角度看国际天然气水合物研发态势[J].天然气地球科学,2005,16(6):825-829.]

[4]Lu Zhenquan,Sultan Nabil,Jin Chunshuang,et al.Semi-quantitative analysis of factors affecting gas hydrate formation conditions and its fractions[J].Chinese Journal of Geophysics,2008,51(1):125-132.[卢振权,Sulatan Nabil,金春爽,等.天然水合物形成条件与含量影响的半定量分析[J].地球物理学报,2008,51(1):125-132.]

[5]Zang Xiaoya,Liang Deqing,Fan Shuanshi,et al.Influence of 5-Type Zeolite powder on tetrahydrofuran hydrate formation and dissociation process[J].Acta Physico Chimica Sinica,2009,25(6):1047-1052.[臧小亚,梁德青,樊栓狮,等.5分子筛粉末对四氢呋喃水合物的生成及分解过程的影响[J].物理化学学报,2009,25(6):1047-1052.]

[6]Wu Shiguo,Dong Dongdong,Yang Shengxiong,et al.Genetic model of the hydrate system in the fine grain sediments in the northern continental slope of South China Sea[J].Chinese Journal of Geophysics,2009,52(7):1849-1857.[吴时国,董冬冬,杨胜雄,等.南海北部陆坡细颗粒沉积物天然气水合物系统的形成模式初探[J].地球物理学报,2009,52(7):1849-1857.]

[7]Xu Wei,Qui Nansheng,Sun Changyu,et al.Different factors on the thickness of gas hydrate stability zone[J].Natural Gas Geoscience,2010,21(3):528-534.[许威,邱楠生,孙长宇,等.不同因素对天然气水合物稳定带厚度的影响[J].天然气地球科学,2010,21(3):528-534.]

[8]Handa Y P,Stupin D.Thermodynamic properties and dissociation characteristics of methane and propane hydrates in 70 radius silica gel pores[J].The Journal of Physical Chemistry B,1992,96:8599-8603.

[9]Uchida T,Ebinuma T,Ishizaki T.Dissociation condition measurements of methane hydrate in confined small pores of porous glass[J].The Journal of Physical Chemistry B,1999,103:3659-3662.

[10]Smith D H,Wilder J W,Seshadri J.Methane hydrate equilibria in silica gels with broad pore-size distributions[J].AIChE  Journal,2002,48(2):393-400.

[11]Aladko E Y,Dyadin Y A,Fenelonov V B,et al.Dissociation conditions of methane hydrate in mesoporous silica gels in wide ranges of pressure and water content[J].The Journal of Physical Chemistry B,2004,108:16540-16547.

[12]Jiang Guanli,Wu Qingbai,Pu Yibin.The effect of cooling process on the formation of methane hydrate within the coarse sand[J].Chinese Journal of Geophysics,2009,52(9):2387-2393.[蒋观利,吴青柏,蒲毅彬.降温过程对粗砂土中甲烷水合物形成的影响[J].地球物理学报,2009,52(9):2387-2393.]

[13][KG*2/3]Hideki M,LRyo O,Yasushi K,et al.Water Permeability Measurements of Gas Hydrate-Bearing Sediments[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[14]Evgeny M C,Ekaterina V K,Tatiana S S,et al.Experimental Simulation of Frozen Hydrate Containing Sediments Formation[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[15]Pascal G,Christophe D,Gérard M,et al.Methane Hydrate Equilibrium Conditions in a Porous Medium:From Experiment to Theory[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[16]Eugeny Y A,Yury A D,Eduard G L,et al.Dissociation Conditions of Gas Hydrates in Mesoporous Silica Gels in Wide Ranges of Pressure and Water Content[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[17]Georgi G,Werner F K,Doroteya K S,et al.Universal Shrinking Core Model For Hydrate Formation and Decomposition[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[18]Faisal D A,Clarke M A,Bishnoi P R.Determination of The Intrinsic Rate of Gas Hydrate Formation and Decomposition Using an In-Situ Particle Size Analyser[C].Proceedings of the Fifth International Conference on Gas Hydrates,Trondheim,Norway,June 12-16,2005.

[19]Peng Zhang,Qingbai Wu,Yibin Pu,et al.Water transfer characteristics during methane hydrate formation and dissociation processes inside saturated sand[J].Journal of Natural Gas Chemistry,2010,19(1):71-76.

[20]Peng Zhang,Qingbai Wu,Guanli Jiang,et al.Water transfer characteristics in the vertical direction during methane hydrate formation and dissociation processes inside non-saturated media[J].Journal of Natural Gas Chemistry,2010,19(2):139-145.

[21]Yousif M H,Sloan E D.Experimental and Theoretical Investigation of Methane-Gas-Hydrate Dissociation in Porous Media[J].SPE Reservoir Eng,1991,6(4):452-458.

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