离子强度和pH对盐溶液中纳米泡静电稳定性的影响
Mohanned Khairy1, Jan Kubelka1, Mohammad Piri1
1Center of Innovation for Flow through Porous Media, Department of Energy and Petroleum Engineering, University of Wyoming, Laramie, Wyoming 82071, United States.
Langmuir : the ACS journal of surfaces and colloids
|August 13, 2025
概括
这项研究揭示了盐度和pH值如何影响纳米泡 (NB) 的稳定性. 高盐度和pH值最初会增加NB度,但会降低长期稳定性,这对于增强石油回收等应用至关重要.
科学领域:
- 合体和表面科学科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 纳米气泡 (NBs) 为各种应用提供了独特的特性.
- 了解不同解决条件下的NB行为是关键的,但有限的.
- NBs 在各种科学和工程领域的潜力被调查.
研究的目的:
- 系统地研究 NBs. 的特性和稳定性.
- 检查不同盐度和pH对NB生成和寿命的影响.
- 为优化NB解决方案提供见解,用于诸如增强石油回收等应用.
主要方法:
- 用扫描电子显微镜,纳米粒子跟踪分析和泽塔电位测量来表征 NB.
- 在不同盐度和pH值的直接条件下,以及通过生成后添加盐或调整pH值来生成和研究NB.
- 最佳NB生成参数被确定为0.5英尺3/小时气流速60分钟.
主要成果:
- 最佳的NB生成产生了高度 (200 × 106气泡/毫升),均大小 (100纳米) 和-34.0mV的泽塔电位.
- 在高盐度/pH的直接生成产生更高的NB初始度由于盐分和表面电荷效应.
- 长期的NB稳定性因高盐度 (EDL压缩) 和非中性pH值显著降低,而酸性条件最不有利.
结论:
- NB的稳定性对溶液的盐度和pH值非常敏感.
- 在恶劣条件下,高初始度不能保证长期NB稳定性.
- 这些发现对于优化NB应用至关重要,特别是增强的石油回收,在充满挑战的环境中需要稳定的NB.
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