收稿日期: 2012-02-20
修回日期: 2012-04-03
网络出版日期: 2012-06-10
基金资助
国家科技重大专项(编号：2011ZX05008-002-22)；国家重点基础研究“973”计划项目(编号：2012CB214704-02)联合资助.
Effect of Sample Size on Volumetric Determination of Methane Adsorption in Clay Minerals
Received date: 2012-02-20
Revised date: 2012-04-03
Online published: 2012-06-10
等温吸附实验显示，同一黏土样品的甲烷吸附量随粒度减小有增加趋势，粒度减小不仅使颗粒内部的孔隙更多地暴露，而且使样品活化程度增高，增加了孔隙连通性、孔隙体积和表面积，从而使吸附量不断增加。孔隙测量表明，绿泥石黏土孔隙率低且以大孔为主，当粒度小于270目时，绿泥石样品的内表面积明显增加，其甲烷吸附量明显的升高。而蒙脱石黏土孔隙率高，以纳米级微孔隙为主，小于270目时可能部分孔隙被破坏，孔隙体积、表面积及甲烷吸附量出现轻微的减小。尽管粒度变化对不同大小孔隙的分布均有一定的影响，但样品表面积和气体吸附量主要受小于20nm，特别是小于10nm微孔隙变化的影响。为提高不同试样气体吸附量测定的准确性和可比性，150~250目粒度范围可作为气体吸附实验研究样品的标准粒度。
吉利明, 罗鹏 . 样品粒度对黏土矿物甲烷吸附容量测定的影响[J]. 天然气地球科学, 2012 , 23(3) : 535 -540 . DOI: 10.11764/j.issn.1672-1926.2012.03.535
The isothermal adsorption experiments show that the methane adsorption capacity in the same clay samples has an increasing trend with particle size decreases. The decreases of particle size not only causes the pores within particles be exposed,but also enhances the degree of sample activation. Thus,the adsorption capacity is increasing due to improvement of pore connectivity,pore volume,and surface area. The porosity measurements indicate that the chlorite clay has the low porosity and larger pores. When the particle size is less than 270 meshes,the internal surface area of chlorite clay increase and the methane adsorption capacity is increased significantly. Montmorillonite clay has the high porosity and nanopores. Some pores may be destroyed when the particle size is less than 270 meshes,and the slight decrease of pore volume,surface area and methane adsorption capacity occurs. Although the grain size distribution has a certain impact on different size pores,the sample surface area and gas adsorption capacity is mainly affected by the microspores with less than 20nm,especially less than 10nm micropores. In order to improve the accuracy and comparability of gas adsorption capacity of various samples,we propose the 150 to 250 mesh particle size as the standard size of samples for gas adsorption experiments.
Key words： Clay mineral; Sample size; Micropore; Surface area; Methane adsorption.
［1］Curtis J B.Fractured shale gas systems［J］.The American Association of Petroleum Geologiests Bulletin,2002,86:1921-1938.
［2］Ross D J K.Shale gas potential of the lower Jurassic Gordondale Member,northeastern British Columbia,Canada［J］.Bulletin of Canadian Petroleum
Geology,2007,55(1):51-75.
［3］Montgomery S L,Jarvie D M,Bowker K A,et al.Mississippian Barnett shale,Fort Worth basin,north-central Texas:
Gas-shale play with multi-trillion cubic foot potential［J］.American Association of Petroleum Geologiests Bulletin,2005,89(2):155-175.
［4］Aringhieri R.Nanoporosity characteristics of some natural clay minerals and soils［J］.Clays and Clay Minerals,2004,52(6):700-704.
［5］Wang C C,Juang L C,Lee C K,et al.Effects of exchanged surfactant cations on the pore structure and adsorption characteristics of
montmorillonite［J］.Journal of Colloid Interface Science,2004,280:27-35.
［6］Cheng A L,Huang W L.Selective adsorption of hydrocarbon gases on clays and organic matter［J］.Organic Geochemistry,2004,35(4):413-423.
［7］Ross D J K,Bustin R M.The importance of shale composition and pore structure upon gas storage potential of shale gas reservoirs［J］.Marine and
Petroleum Geology,2009,26:916-927.
［8］Ji Liming,Qiu Junli,Xia Yanqing,et al.SEM micro-pore characteristics and methane adsorption properties of common clay minerals［J］.Acta
Petrolei Sinica,2012,33(2):1-8.［吉利明,邱军利,夏燕青,等.常见黏土矿物电镜扫描微孔隙特征与甲烷吸附性研究［J］.石油学报,2012,33(2):1-8.］
［9］Milewska-Duda J,Ceglarska-Stefańska G,Duda J.A comparison of theoretical and empirical expansion of coals in the high pressure sorption of
methane［J］.Fuel,1994,73(6):975-979.
［10］Crosdale P J,Beamish B B,Valix M.Coalbed methane sorption related to coal composition［J］.International Journal of Coal Geology,1998,35:147-158.
［11］Busch A,Gensterblum Y,Krooss B M.Methane and CO2sorption and desorption measurements on dry Argonne premium coals:pure components and
mixtures［J］.International Journal of Coal Geology,2003,55:205-224.
［12］Busch A,Gensterblum Y,Krooss B M,et al.Investigation of high-pressure selective adsorption/desorption behaviour of CO2and CH4 on coals:An experimental study［J］.International Journal of Coal Geology,2006,66:53-68.
［13］Li Dawei,Wang Deming,Gu Junjie,et al.Experiment research on coal physical oxygen sorption law with temperature and particle size variation［J］.Coal
Science and Technology,2008,36(2):42-44.［李大伟,王德明,顾俊杰,等.煤物理吸氧量随温度及粒径变化规律的实验研究［J］.煤炭科学技术,2008,36(2):42-44.］
［14］Zhang Tianjun,Xu Hongjie,Li Shugang,et al.The effect of particle size on adsorption of methane on coal［J］.Journal of Hunan University of Science ＆
Technology:Natural Science Edition,2009,24(1):9-12.［张天军,许鸿杰,李树刚,等.粒径大小对煤吸附甲烷的影响［J］.湖南科技大学学报:自然科学版,2009,24(1):9-12.］
［15］Oades J M.Associations of Colloidal Materials in Soils.Transactions of the XIII Congress of the International Soil Science Society
［R］.Germany:Hamburg,1986：660-674.
［16］Aylmore L A G,Quirk J P.The micropore size distribution of clay mineral systems［J］.Journal of Soil Science,1967,18:1-17.
［17］Bustin R M,Bustin A M M,Cui X,et al.Impact of Shale Properties on Pore Structure and Storage Characteristics［C］.SPE 119892,2008.
［18］Li Yanli.Calculation method of shale gas reserves［J］.Natural Gas Geoscience,2009,20(3):466-470.［李艳丽.页岩气储量计算方法探讨［J］.天然气地球科
学,2009,20(3):466-470.］
［19］Guo Tonglou,Li Yuping,Wei Zhihong.Reservoir-forming conditions of shale gas in Ziliujing Formation of Yuanba area in Sichuan basin\
[J\].Natural Gas
Geoscience,2011,22(1):1-7.
[郭彤楼,李宇平,魏志红.四川盆地元坝地区自流井组页岩气成藏条件
[J].天然气地球科学,2011,22(1):1-7.]
［20］Wang Feiyu,He Zhiyong,Meng Xiaohui,et al.Occurrence of shale gas and predication of original gas in-place(OGIP)［J］.Natural Gas Geoscience,2011,22
(3):501-510.［王飞宇,贺志勇,孟晓辉,等.页岩气赋存形式和初始原地气量(OGIP)预测技术［J］.天然气地球科学,2011,22(3):501-510.］
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号