关于CO2液体吸收的液态动力学液体吸收的快速动力学的定量研究,微气泡通过微流体可视化和计算流体动力学方法实现
Qinglin Chen1, Zhennan He1, Yinglong Zhang1
1School of Energy and Power Engineering, Shandong University, Jinan 250061, China.
Analytical chemistry
|November 7, 2025
概括
工程微气泡极大地加快了二氧化碳 (CO2) 在液体中的吸收. 这项快速动力学研究显示,在200毫秒内,二氧化碳的去除率高达99%,提供了一个有前途的碳捕获技术.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 流体动力学 流体动力学
背景情况:
- 液体吸收是全球变暖减缓的关键碳捕获方法.
- 气液界面上的质量转移动力学对于吸收效率至关重要.
- 了解吸收剂类型和泡动态等因素对于优化二氧化碳捕获至关重要.
研究的目的:
- 量化研究二氧化碳 (CO2) 微气泡的液体吸收的快速动力学.
- 分析吸收剂类型和度对二氧化碳微泡吸收的影响.
- 阐明控制微流体系统中二氧化碳吸收的质量转移机制.
主要方法:
- 使用具有流量聚焦通道的微流体平台,在水溶液中产生CO2微泡.
- 使用了三个吸收剂:异二胺 (IPDA),单乙胺 (MEA) 和氧化 (KOH).
- 使用高速显微镜可视化泡动力学,分析形态和速度;执行计算流体动力学 (CFD) 分析.
主要成果:
- 二氧化碳泡的大小在100ms内迅速减少,达到平衡.
- 在200ms内达到高达99%的体积收缩和质量损失.
- 吸收效率与吸收体积分数高达20%正相关;CFD显示对流占据了质量转移的主导地位 (Peclet数:25,00042,500).
结论:
- 在液体溶液中流动的工程微气泡显著提高了用于二氧化碳捕获的相间质量转移.
- 水力动力学效应,特别是对流,在加速二氧化碳溶解方面发挥着主导作用.
- 这种方法为高效和快速的碳捕获技术提供了一个有希望的战略.
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