Gas Flow Behavior through Inorganic Nanopores in Shale Considering Confinement Effect and Moisture Content,Industrial & Engineering Chemistry Research

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Gas Flow Behavior through Inorganic Nanopores in Shale Considering Confinement Effect and Moisture Content
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-02-23 00:00:00 , DOI: 10.1021/acs.iecr.8b00271
Zheng Sun _{1,

2} , Juntai Shi _{1,

2} , Keliu Wu _{1,

2} , Xiangfang Li _{1,

2}

Affiliation

Previous attempts to characterize the gas transport through inorganic nanopores were not fully successful. The presence of an adsorption water film within nanopores is generally overlooked. Moreover, the compound influences of moisture content and confinement effect on critical properties of the gas phase have not been considered before. With the intent of overcoming these deficiencies, a fully coupled analytical model has been developed, in which complex bulk-gas transport mechanisms, moisture content, confinement effect, and various cross-section shapes of nanopores are incorporated. Results show that the confinement effect will significantly enhance the apparent gas permeability when the pore radius is smaller than 5 nm, and the real-gas effect can achieve an average increase of 4.38% when the pore radius falls in the range 1–2 nm. The stress dependence will greatly decrease the apparent gas permeability and the corresponding degree for slitlike inorganic nanopores will slightly increase with the increasing aspect ratio.

中文翻译：

考虑限制作用和含水量的页岩中无机纳米孔的气体流动行为

先前表征气体通过无机纳米孔传输的尝试并未完全成功。通常忽略了纳米孔内吸附水膜的存在。而且，以前从未考虑过水分含量和限制作用对气相关键性质的复合影响。为了克服这些缺陷，已开发出一种完全耦合的分析模型，其中纳入了复杂的散装气体传输机制，水分含量，限制作用和各种横截面形状的纳米孔。结果表明，当孔半径小于5 nm时，约束作用将显着提高表观气体渗透率；当孔半径在1-2 nm范围内时，实际气体效应可平均提高4.38％。

更新日期：2018-02-23

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