CO2注入压力对增强的煤气提取气体的作用
Gang Bai1,2, Jun Su3,4, Yadong Wang5,6
1College of Safety Science & Engineering, Liaoning Technical University, Huludao, Liaoning, 125105, China. baigang0210@163.com.
在煤层中优化二氧化碳 (CO2) 注入压力可以提高甲 (CH4) 提取和二氧化碳 (CO2) 封存. 然而,过度的压力会降低封存效率,建议调整压力以获得最佳结果.
科学领域:
- 地质科学 地质科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 煤层气 (CSG) 提取和二氧化碳 (CO2) 封存对于能源生产和减缓气候变化至关重要.
- 碳化合物的CO2排放提供了增强的气体回收和温室气体储存的双重好处.
- 气体注入压力是影响该过程效率和安全性的关键参数.
研究的目的:
- 调查不同CO2注入压力对CSG提取和CO2封存效率的影响.
- 确定最佳的CO2注入压力范围,以最大限度地提高甲 (CH4) 回收和CO2储存能力.
主要方法:
- 实验性研究涉及控制注射CO2到不同压力的煤层样本.
- 监测气体提取速率,CH4溶解,CO2封存以及煤层参数 (压力,温度).
主要成果:
- 增加的CO2注入压力减少了气体注入和提取时间,增加了平衡压力和煤层温度.
- 较高的注射压力导致CH4累积脱吸能力和脱吸速率增加4.98%.
- 达到剩余气体含量的时间减少了62.04分钟,最大的CO2储存增加了3.6m3/t.
- 随着CO2注入压力的增加,碳封存效率下降.
结论:
- 升高的CO2注入压力增强了CH4脱落和CO2封存,改善了CH4的产率.
- 建议在低效率脱阶段降低CO2注入压力,以优化整体过程.
- 精心管理CO2注射压力对于平衡高效的CSG提取与有效的CO2封存至关重要.
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