Combining Image Recognition and Simulation To Reproduce the Adsorption/Desorption Behaviors of Shale Gas

doi:10.1021/acs.energyfuels.9b03669

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Combining Image Recognition and Simulation To Reproduce the Adsorption/Desorption Behaviors of Shale Gas
	Lin K(林岿)1,2; Huang XF(黄先富)1,2; Zhao YP(赵亚溥)1,2
刊名	ENERGY & FUELS
	2020
卷号	34 期号:1 页码:258-269
ISSN号	0887-0624
DOI	10.1021/acs.energyfuels.9b03669
通讯作者	Zhao, Ya-Pu(yzhao@imech.ac.cn)
英文摘要	Shale gas stored in deep shale is in a supercritical state. Therefore, it is necessary to study the adsorption and desorption properties of supercritical shale gas. To accurately determine the state of methane (CH4) in the pores of deep shale, the fractal characteristics of several shale samples drilled at a depth of 2650 m are analyzed using scanning electron microscopy (SEM) and image analysis. We find nanopores with different fractal features in the shale. The effects of adsorption energy and substrate strain on adsorption capacity are clarified. The virial coefficients of CH4 are obtained by molecular dynamics (MD) simulations and are consistent with the experiment. The adsorption and desorption of CH4 in different fractal nanopores are modeled using grand canonical Monte Carlo (GCMC) simulations at different temperatures and pressures (from capillary condensation to supercritical state). Additionally, the gas-in-place (GIP), excess adsorption, and absolute adsorption isotherms are obtained. We find the crossover of excess adsorption isotherms, which was observed in the experiment, and the absolute adsorption amount increases with the increase in pressure in the case of ultrahigh pressure (>40 MPa). Moreover, we obtain an ultrahigh-pressure dual-site Langmuir equation, and it can accurately describe observed adsorption isotherms from low pressure to ultrahigh pressure. Our study visually reproduces the adsorption/desorption behaviors of CH4 under in situ conditions in deep shale and reveals their microscopic mechanism.
分类号	二类
资助项目	National Natural Science Foundation of China (NSFC)[11872363] ; National Natural Science Foundation of China (NSFC)[51861145314] ; National Natural Science Foundation of China (NSFC)[11702299] ; Chinese Academy of Sciences (CAS) Key Research Program of Frontier Sciences[QYZDJ-SSW-JSC019] ; CAS Strategic Priority Research Program[XDB22040401] ; PetroChina Innovation Foundation
WOS关键词	MOLECULAR-DYNAMICS SIMULATIONS ; NATURAL-GAS ; FRACTAL CHARACTERISTICS ; METHANE ADSORPTION ; PORE STRUCTURE ; SPONTANEOUS IMBIBITION ; COAL ; PRESSURE ; DISPLACEMENT ; DIFFUSION
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
WOS记录号	WOS:000508470500023
资助机构	National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS) Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program ; PetroChina Innovation Foundation
其他责任者	Zhao, Ya-Pu
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/81300]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Lin K,Huang XF,Zhao YP. Combining Image Recognition and Simulation To Reproduce the Adsorption/Desorption Behaviors of Shale Gas[J]. ENERGY & FUELS,2020,34(1):258-269.
APA	林岿,黄先富,&赵亚溥.(2020).Combining Image Recognition and Simulation To Reproduce the Adsorption/Desorption Behaviors of Shale Gas.ENERGY & FUELS,34(1),258-269.
MLA	林岿,et al."Combining Image Recognition and Simulation To Reproduce the Adsorption/Desorption Behaviors of Shale Gas".ENERGY & FUELS 34.1(2020):258-269.