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由纳米孔产生的纳米泡来探测气液质量转移特征

Harsh Sharma¹, Neelkanth Nirmalkar¹, Wen Zhang²

¹Department of Chemical Engineering, Indian Institute of Technology Ropar, Rupnagar-140001, India.

Journal of colloid and interface science

|March 26, 2024

概括

通过纳米孔扩散产生的氧气纳米气泡显示尺寸取决于孔径大小,并且由于表面电荷而延迟缩. 虽然它们提供了优异的氧气传输,但它们并没有显著增加溶解氧气水平.

科学领域:

纳米技术纳米技术
表面科学是一门学科.
流体动力学流体动力学

背景情况:

纳米气泡是充满气体的空腔,具有独特的特性.
它们的形成和行为受到生产方法和表面特征的影响.
了解纳米气泡动力学对于大质量转移中的应用至关重要.

研究的目的:

为了研究纳米孔大小和纳米气泡缩之间的关系.
为了确定纳米泡表面电荷对断动态的影响.
为了评估纳米泡的质量转移效率和溶解氧的贡献.

主要方法:

使用纳米孔扩散技术研究了体积质量转移系数 (k_La).
多样化的膜孔尺寸,流速,pH值和温度.
量化k_La通过通过净化测量氧气耗尽.

主要成果:

纳米泡大小与纳米孔大小相反相关,遵循一个电力定律关系.
发现纳米气泡表面电荷延迟了气液界面的断.
纳米泡的k_La是微泡的3-4倍,氧气传输效率为78%.
稳定的纳米泡不会显著增加水中的溶解氧含量.

结论:

纳米孔尺寸是控制纳米泡尺寸的关键因素.
表面电荷影响了纳米泡的稳定性和剥离.
纳米泡提供增强的氧气质量转移,但对整体溶解氧气水平的影响有限.

关键词:

气化气化气化气化这是一个纳米泡.纳米孔扩散技术的技术.氧气转移效率效率是指氧气的转移效率.量度质量转移系数的体积转移系数

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