关于通过煤层水注入二氧化碳排放的实验研究
Tianwei Shi1, Yishan Pan1, Aiwen Wang1
1Institute of Disaster Rock Mechanics, Liaoning University, Shenyang 110036, China.
ACS omega
|April 1, 2024
概括
水注入有效地将二氧化碳从煤炭中取代,防止爆发. 这项研究揭示了排水机制,表明流动的水通过各种排水模式加速了煤炭气的脱吸.
科学领域:
- 地质工程是地质工程.
- 采矿工程 采矿工程 采矿工程
- 煤炭科学 煤炭科学
背景情况:
- 煤炭和天然气爆发在采矿业务中带来了重大风险.
- 注水是一种已知的方法,可以通过将吸附的气体取代来减轻这些风险.
- 连续注入水来取代煤炭中吸附的二氧化碳的精确机制需要进一步研究.
研究的目的:
- 为了研究连续注入水来取代煤炭中吸附的二氧化碳的机制.
- 分析吸附平衡压力对二氧化碳排放的影响.
- 识别和讨论煤炭中基于水的二氧化碳排放的不同模式.
主要方法:
- 实验研究涉及连续注入水以恒定压力,但不同的吸附平衡压力.
- 分析排放的二氧化碳量,时间,排放速度和比例.
- 描述水位移,气体溶解和气体扩散-溶解位移模式.
主要成果:
- 二氧化碳排放发生在三个阶段:快速,缓慢和停止生长.
- 较高的吸附平衡压力导致在给定的时间内更大的二氧化碳排放.
- 排离率呈现上升,峰值和下降阶段,在更高的压力下,排离率增加和峰值持续时间缩短.
- 二氧化碳排放率为45%-54%,但水作用率,包括溶解气体,接近或超过自然脱吸.
结论:
- 流水注入加速了二氧化碳从煤炭中脱落的速度.
- 位移过程涉及水位移,气体溶解和气体扩散-溶解机制.
- 这些发现为防止和控制煤炭和天然气爆发提供了洞察力.
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