研究CH4水合物的路径依赖性形态及其与高压微流体学研究的解离
Jidong Zhang1, Zhenyuan Yin1, Saif A Khan2
1Institute for Ocean Engineering, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China. zyyin@sz.tsinghua.edu.cn.
Lab on a chip
|February 7, 2024
概括
这项研究揭示了两种甲水合物 (MH) 形成机制和三种气泡进化阶段,在使用新型微流体装置的解离过程中,提供了对天然气水合物储生产的见解.
科学领域:
- 地质科学 地质科学
- 能源科学 能源科学
- 材料科学 材料科学 材料科学
背景情况:
- 甲水合物 (MHs) 是一个有前途的能源,但了解孔尺度的形成和解离对于高效的天然气水合物 (NGH) 储生产至关重要.
- 有效的NGH生产策略取决于了解MH分布及其对气液双相流动力学的影响.
研究的目的:
- 通过使用一种新型的高压微流体芯片装置,在孔尺度上直接观察和分析MH形成和解离行为.
- 调查MH核和生长机制以及热解离过程中气泡演变的各个阶段.
主要方法:
- 开发一种新型高压微流体芯片装置,用于直接对MHS进行孔尺度观测.
- 通过在10.0MPa的热刺激来检查MH核化,生长和解离.
- 应用一个定制设计的图像分析技术来识别气泡在解离过程中的演变阶段.
主要成果:
- 确定了两个同时存在的MH形成机制:多孔型MH (来自CH4气泡) 和晶体型MH (来自溶解的CH4).
- 水晶类型的MH生长可以触发多孔类型的MH核化,MHs优先生长在气液接口上.
- 在热解离过程中观察到三种不同的气泡进化阶段:单个气泡生长,快速集群生成和气泡凝聚.
结论:
- 新的微流体仪器和图像分析技术提供了毛孔尺度MH动态的直接视觉证据.
- 这些发现提供了关于NGH水库流体生产过程中气液双相流量的宝贵见解.
- 了解这些孔尺度现象对于优化从甲水合物资源中提取能量至关重要.
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