| Molecular Simulation of Nitrogen Adsorption in Multidimensional Nanopores and New Insights into the Inversion of Pore Size Distribution for Gas Shale |
| Chen Z(陈卓)1,2; Lin M(林缅)1,2 ; Jiang WB(江文滨)1,2; Cao GH(曹高辉)1
|
| Corresponding Author | Lin, Mian(linmian@imech.ac.cn)
; Jiang, Wenbin(jiangwenbin@imech.ac.cn)
|
| Source Publication | ENERGIES
(IF:2.707[JCR-2018],2.99[5-Year]) |
| 2023-12-01
|
| Volume | 16Issue:24Pages:20 |
| Abstract | Low-temperature nitrogen adsorption is a widely used method for the research and evaluation of gas shale's pore structure. The existing interpretation method, utilizing gas adsorption isotherms to obtain pore size distribution (PSD), is always based on the one-dimensional geometry model, while the void space of gas shale has strong multi-dimensional characteristics. It is necessary to investigate the nitrogen condensation and evaporation behavior in multidimensional structures. In this study, a series of two-dimensional and three-dimensional models based on ink-bottle pores were constructed. A hybrid molecular simulation approach combining grand canonical Monte Carlo (GCMC) and molecular dynamics (MD) is proposed to simulate the low-temperature nitrogen adsorption isotherms. Three aspects have been analyzed in detail. Compared with the conventional understanding that the threshold of cavitation in the ink-bottle pore only relates to throat diameter, this study discloses a wider and more comprehensive range of conditions of cavitation that considers both the throat length and diameter. As pore spaces of shale samples consist of many complex interconnected pores, the multi-stage ink-bottle pore model is more suitable than the single ink-bottle pore model to similarly reproduce the wider cavitation pressure range. A more universal parameter is proposed that quantitatively unifies the influence of cavity diameter and length on condensation pressure and has good applicability in cavities with different shapes. This work quantitatively studies the nitrogen adsorption isotherms of three-dimensional complex nanopore structures using molecular simulation and provides a reasonable explanation for the low-temperature nitrogen adsorption isotherms of gas shale. |
| Keyword | shale
pore size distribution
molecular simulation
low-temperature nitrogen adsorption
|
| DOI | 10.3390/en16248066
|
| Indexed By | SCI
; EI
|
| Language | 英语
|
| WOS ID | WOS:001135925400001
|
| WOS Keyword | HYSTERESIS LOOP
; CAVITATION
; BLOCKING
; ISOTHERM
; SYSTEMS
; AREA
|
| WOS Research Area | Energy & Fuels
|
| WOS Subject | Energy & Fuels
|
| Funding Project | National Natural Science Foundation of China
; Beijing, China
|
| Funding Organization | National Natural Science Foundation of China
; Beijing, China
|
| Classification | Q3
|
| Ranking | 1
|
| Contributor | Lin, Mian
; Jiang, Wenbin
|
| Citation statistics |
|
| Document Type | 期刊论文
|
| Identifier | http://dspace.imech.ac.cn/handle/311007/94031
|
| Collection | 流固耦合系统力学重点实验室
|
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
|
Recommended Citation
GB/T 7714 |
Chen Z,Lin M,Jiang WB,et al. Molecular Simulation of Nitrogen Adsorption in Multidimensional Nanopores and New Insights into the Inversion of Pore Size Distribution for Gas Shale[J]. ENERGIES,2023,16,24,:20.Rp_Au:Lin, Mian, Jiang, Wenbin
|
| APA |
陈卓,林缅,江文滨,&曹高辉.(2023).Molecular Simulation of Nitrogen Adsorption in Multidimensional Nanopores and New Insights into the Inversion of Pore Size Distribution for Gas Shale.ENERGIES,16(24),20.
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| MLA |
陈卓,et al."Molecular Simulation of Nitrogen Adsorption in Multidimensional Nanopores and New Insights into the Inversion of Pore Size Distribution for Gas Shale".ENERGIES 16.24(2023):20.
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