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吸附诱导的变形在微孔的气和甲:影响地下储存气的影响
Saeed Babaei1, Benoit Coasne2,3, Mehdi Ostadhassan4
1Civil Engineering Faculty, K. N. Toosi University of Technology, Tehran 1996715433, Iran.
Langmuir : the ACS journal of surfaces and colloids
|March 3, 2025
概括
准确的地下储存 (UHS) 需要了解页岩中的气体吸附和扩散. 忽视煤气膨胀可能会导致大量低估储存能力,影响安全性和效率.
科学领域:
- 地质化学 地质化学
- 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.
背景情况:
- 准确评估气体吸附和扩散对于在枯竭的页岩气储库中地下储存 (UHS) 至关重要.
- 素在H2吸附中的作用及其诱导的胀是UHS的关键但未被充分研究的方面.
研究的目的:
- 通过分子模拟,研究H2和CH4吸附机制和煤化物中的扩散行为.
- 分析煤化物变形对页岩水库中H2储能能力的影响.
主要方法:
- 利用拉格朗日和欧勒尔的方法来研究吸附机制.
- 采用分子模拟来分析煤气中的气体扩散.
- 研究了煤气气体膨胀和收缩对气体吸附的影响.
主要成果:
- 在使用CH4作为缓冲气体时,忽视煤化物变形可能会低估储能~40%.
- 吸附H2导致煤化物因孔径大小而膨胀或收缩,与CH4的持续膨胀不同.
- 在煤化物中,H2的自我扩散速度是CH4扩散的10倍.
结论:
- 煤气的灵活性显著影响了页岩水库中H2储存的估计.
- 精确的UHS建模需要纳入煤气变形,特别是混合气体储存.
- 这些发现提高了在页岩层中储存的安全性和效率.
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