地质因素对H2吸附在地表下面的控制
Xiaoqiang Li1, Clifford C Walters2, Tongwei Zhang2
1Department of Earth and Environment Sciences, University of Texas at Arlington, Arlington, Texas 76019, United States.
在煤层中地下储存气,由于物理吸附,可使储存容量增加30%以上. 地质因素,特别是有机功能群,显著影响岩石中的 (H2) 吸附.
科学领域:
- 地质化学 地质化学
- 地下储能 储能 地下储能 储能
背景情况:
- 地下储存对于稳定的经济至关重要.
- 了解影响 (H2) 恢复和吸附的地质因素对于安全有效的储存至关重要.
研究的目的:
- 调查地质因素对有机丰富和瘦岩石样本中H2吸附的影响.
- 为了在不同的条件下比较煤炭和石灰岩中H2和甲 (CH4) 的吸附.
主要方法:
- 在35~65°C的温度和高达15MPa的压力下,对煤和石灰岩的H2和CH4吸附度的测量.
- 兰木尔单层建模用于分析吸附数据.
- 在不同类型的岩石之间比较吸附行为.
主要成果:
- 煤炭样本显示H2和CH4吸附率明显高于矿.
- BET表面积对于H2吸附很重要,但化学结构,特别是有机含氧的功能组,起着关键的作用.
- 在类似的地质条件下,煤层可以储存至少30%的H2比自由阶段更多,主要是通过物理吸附.
结论:
- 地质因素,包括地表面积和化学成分,控制了地下形成的H2吸附.
- 在煤层中储存是一种有前途的选择,由于物理吸附机制而提高了容量.
- 进一步了解这些相互作用对于优化地质储存至关重要.
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