形碳纳米管中的页岩气纳米流体:一个分子动力学模拟研究
Jiang Wang1, Zhiling Li1, Wenli Zhang2
1College of Science, Guizhou Institute of Technology, Boshi Road, Dangwu Town, Gui'an New District, Guizhou 550025, China.
ACS omega
|July 22, 2024
概括
这项研究使用分子动力学模拟来探索曲线纳米通道如何影响甲气体. 研究结果显示,道几何学会影响气体吸附和流量,这对于页岩气回收至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 物理 物理学 物理
背景情况:
- 曲纳米通道在页岩等多孔材料中很常见,影响页岩气的行为和回收.
- 了解这些复杂几何形状中的气体运输对于优化能源提取至关重要.
研究的目的:
- 研究曲和半径在曲单壁碳纳米管 (SWCNT) 纳米通道中对甲吸附和运输的影响.
- 分析道几何学如何影响甲流动力学和吸附特性.
主要方法:
- 采用分子动力学 (MD) 模拟,在曲线SWCNT中建模甲气体.
- 改变通道曲率和半径以观察气体性质的变化.
主要成果:
- 在SWCNT的内半部分 (负曲率) 观察到增强的甲吸附.
- 在更直,更窄的道中,甲流速更高;在更宽的道中,流量更高.
- 不为零的流速会改变吸附,外半部分的吸附比内半部分强.
- 触角速度和垂直速度的异质分布,在外半部分的触角速度更高.
- 由入口附近的垂直速度脉冲诱导的动流,减少触流速度.
结论:
- 道曲率和半径显著影响SWCNT纳米通道中的甲吸附和运输.
- 结果提供了对状多孔介质中的页岩气行为和碳纳米管中的纳米流体的见解.
- 这些发现与提高页岩气回收工程和理解纳米尺度流体行为的相关.
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