IMECH-IR  > 流固耦合系统力学重点实验室
Molecular dynamics investigation of conversion methods for excess adsorption amount of shale gas
Jiang WB(江文滨); Lin M(林缅)
发表期刊JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
2018
卷号49页码:241-249
ISSN1875-5100
摘要

In investigations of shale gas found within shale formations, the conversion of the experimentally determined excess adsorption amount to the absolute amount is crucial to the interpretation of experimental adsorption data. In our study, the excess isotherms of a shale sample from the Longmaxi Formation in China are converted to absolute ones using existing methods. Keeping in mind that the results differ widely across methods and that the accuracies of these methods are poorly understood, we take a first step towards revealing and evaluating the possible discrepancies. We construct a molecular dynamics (MD) model considering methane adsorption in nanometer channels of different widths, and the model is able to calculate the excess and absolute adsorption amounts. Our simplified MD model is proved to be able to reproduce the excess adsorption isotherms of the shale sample through comparison with experimental data. We also evaluate existing conversion methods for calculation of the excess adsorption amount based on MD results. The methods that use predetermined adsorbedphase density values usually underestimate the absolute amount. Further, the modified Langmuir and Toth equation methods underestimate results under most conditions. The relative error is large at higher pressure, higher temperature, and in smaller channels, and it can be as large as 45%. Our study will serve to remind researchers about uncertainty of the results these methods, which can be useful in application.

关键词Shale Gas Adsorbed-phase Density Excess Adsorption Absolute Adsorption Molecular Dynamics
DOI10.1016/j.jngse.2017.11.006
收录类别SCI ; EI
语种英语
WOS记录号WOS:000418516900020
关键词[WOS]METHANE ADSORPTION ; SIMULATION ; PORES ; TIGHT ; PERMEABILITY ; RESERVOIRS ; DIFFUSION ; TRANSPORT ; ROCKS
WOS研究方向Energy & Fuels ; Engineering
WOS类目Energy & Fuels ; Engineering, Chemical
项目资助者Major National Science and Technology Special Program of China(2017ZX05037-001) ; National Program on Key Basic Research Project (973 Program)(2014CB239004) ; National Natural Science Foundation of China(41690132 ; Strategic Priority Research Program of the Chinese Academy of Sciences(XDB10020302) ; 41574129)
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/72222
专题流固耦合系统力学重点实验室
推荐引用方式
GB/T 7714
Jiang WB,Lin M. Molecular dynamics investigation of conversion methods for excess adsorption amount of shale gas[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2018,49:241-249.
APA Jiang WB,&Lin M.(2018).Molecular dynamics investigation of conversion methods for excess adsorption amount of shale gas.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,49,241-249.
MLA Jiang WB,et al."Molecular dynamics investigation of conversion methods for excess adsorption amount of shale gas".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 49(2018):241-249.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jiang WB(江文滨)]的文章
[Lin M(林缅)]的文章
百度学术
百度学术中相似的文章
[Jiang WB(江文滨)]的文章
[Lin M(林缅)]的文章
必应学术
必应学术中相似的文章
[Jiang WB(江文滨)]的文章
[Lin M(林缅)]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。