兰州大学机构库 >地质科学与矿产资源学院
Experimental investigation of main controls to methane adsorption in clay-rich rocks
Ji, LM; Zhang, TW(张同伟); Milliken, KL; Qu, JL; Zhang, XL; Zhang, TW (reprint author), Univ Texas Austin, Bur Econ Geol, Jackson Sch Geosci, Austin, TX 78713 USA.
ESI NOTE2017-07-19;Highly Cited Papers
2012-12
Source PublicationAPPLIED GEOCHEMISTRY
ISSN0883-2927
Volume27Issue:12Pages:2533-2545
AbstractIn this study a series of CH4 adsorption experiments on clay-rich rocks were conducted at 35 degrees C, 50 degrees C and 65 degrees C and at CH4 pressure up to 15 MPa under dry conditions. The clay-dominated rock samples used are fresh samples from quarries and mines. Samples are individually dominated by montmorillonite, kaolinite, illite, chlorite, and interstratified illite/smectite. The experimental results show that clay mineral type greatly affects CH4 sorption capacity under the experimental conditions. In terms of relative CH4 sorption capacity: montmorillonite >> illite/smectite mixed layer > kaolinite > chlorite > illite. Physisorption is the dominant process for CH4 absorption on clay minerals, as a result, there is a linear correlation between CH4 sorption capacity and BET surface area in these clay-mineral dominated rocks. The abundance of micro-mesopores in the size range of a few to a few 10 s of nanometers in montmorillonite clay and illite-smectite interstratified clay results in large BET surface area values for these mineral species. A good linear relationship between the natural logarithm of Langmuir constant and the reciprocal of temperature exists for clay-mineral dominated rocks, which provides a way to quantify the impact of clay mineral type on gas adsorption capacity. Thermodynamic parameters, the heat of CH4 adsorption and the standard entropy, are calculated based on this linear correlations. The heat of adsorption (q) and the standard entropy (Delta s(o)) range from 9.4 to 16.6 kJ/mol and from -64.8 to -79.5 J/mol/K, respectively, values considerably smaller than those for CH4 adsorption on kerogens. Thus, it is expected that CH4 molecules may preferentially occupy surface sites on organic matter, in addition, the clay minerals are easily blocked by water. As a consequence, organic-rich mudrocks possess a larger CH4 sorption capacity than clay-dominated rocks lacking organic matter. (C) 2012 Elsevier Ltd. All rights reserved.
Subject AreaGeochemistry & Geophysics
PublisherELSEVIER
DOI10.1016/j.apgeochem.2012.08.027
Publication PlaceOXFORD
Indexed BySCIE ; EI ; ESI
Language英语
First Inst
Funding Project国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 国家科技重大专项
Project NumberBureau's Mudrock Systems Research Laboratory consortium [2012CB214704, 2012CB214701] ; Major State Basic Research Development Program of China [2012CB214704, 2012CB214701] ; National Science and Technology Major Projects of the Ministry of Science and Technology of China [2011ZX05008-002-22] ; Chinese Natural Science Foundation [20100559] ; Jackson School of Geosciences, The University of Texas at Austin
WOS IDWOS:000310757600024
Funding OrganizationMOST
SubtypeArticle
EI ID20124615666464
Department[Ji, Liming;
Zhang, Tongwei;
Milliken, Kitty L.] Univ Texas Austin, Bur Econ Geol, Jackson Sch Geosci, Austin, TX 78713 USA;
[Ji, Liming;
Qu, Junli] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Lanzhou 730000, Peoples R China;
[Zhang, Xiaolong] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China
Citation statistics
Cited Times:390[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/120615
Collection地质科学与矿产资源学院
Corresponding AuthorZhang, TW (reprint author), Univ Texas Austin, Bur Econ Geol, Jackson Sch Geosci, Austin, TX 78713 USA.
Recommended Citation
GB/T 7714
Ji, LM,Zhang, TW,Milliken, KL,et al. Experimental investigation of main controls to methane adsorption in clay-rich rocks[J]. APPLIED GEOCHEMISTRY,2012,27(12):2533-2545.
APA Ji, LM,Zhang, TW,Milliken, KL,Qu, JL,Zhang, XL,&Zhang, TW .(2012).Experimental investigation of main controls to methane adsorption in clay-rich rocks.APPLIED GEOCHEMISTRY,27(12),2533-2545.
MLA Ji, LM,et al."Experimental investigation of main controls to methane adsorption in clay-rich rocks".APPLIED GEOCHEMISTRY 27.12(2012):2533-2545.
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