湿度对二氧化碳的影响2 三维多孔介质中的动态溶解:使用格子博尔兹曼方法进行多孔尺度模拟
Yue Sun1, Hang Yu1,2, Bo Yang3
1School of Energy and Mining Engineering, China University of Mining & Technology Beijing, Beijing 100083, China.
Langmuir : the ACS journal of surfaces and colloids
|October 14, 2024
概括
岩石的湿透性显著影响在多孔介质中的超临界CO2溶解. 强烈的水湿条件通过增加CO2 - 水接口面积来增强CO2溶解,这对于有效的碳储存至关重要.
科学领域:
- 地质科学和环境科学 地球科学和环境科学
- 化学工程是化学工程的重要组成部分.
- 计算流体动力学的流体动力学.
背景情况:
- 在地质构成中有效储存二氧化碳 (CO2) 需要了解在多孔介质中的超临界CO2 (scCO2) 溶解.
- 精确的孔尺度建模动态scCO2溶解和湿度的作用仍然是一个重大挑战.
研究的目的:
- 研究岩石湿度对三维多孔介质中scCO2动态溶解行为的影响.
- 为了澄清不同的湿度条件如何影响二氧化碳泡动态,度和溶解速率.
主要方法:
- 采用格子博尔茨曼法 (LBM) 来模拟scCO2-水两相流,溶液运输和反应.
- 在各种可湿性条件下分析了scCO2气泡的大小,数量和分布 (强水湿,弱水湿,中等湿,混合湿).
- 量化了湿度对二氧化碳度,pH值,特定接口面积和质量转移系数的影响.
主要成果:
- 微弱的水湿和中间湿条件导致了小的,死胡同分布的scCO2集群.
- 强烈的湿水和混合湿水条件导致孔中心中更大,相互连接的scCO2集群,增加了scCO2 - 水接口面积和溶解率.
- 在scCO2和度和特定接口面积之间建立了强烈的线性相关性;质量转移系数在中间水友性时达到峰值.
结论:
- 岩石的湿透性是控制scCO2溶解动态和在多孔介质中的效率的关键因素.
- 优化可湿性可以提高二氧化碳的溶解和储存能力.
- LBM提供了一个强大的框架来模拟复杂的多相流和与二氧化碳捕获相关的反应式运输过程.
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