风洞和流体室用于分散排放采样的比较研究:实验评估和理论方法
Luca Carrera1, Francesca Tagliaferri1, Anna Albertini1
1Politecnico di Milano, Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", P.za Leonardo da Vinci 32, 20133, Milano, Italy.
Chemosphere
|February 26, 2025
概括
来自被动来源的工业气味排放的特征是复杂的. 这项研究比较了风洞 (WT) 和流室 (FC) 设备,发现WT可能高估了低可溶性VOC的排放量.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 大气化学 大气化学
背景情况:
- 被动区域源对工业气味排放的表征提出了挑战.
- 风洞 (WT) 和流室 (FC) 是具有明显空气流动性的关键采样装置.
- 关于它们在表示流体动态和排放率方面的准确性存在争议.
研究的目的:
- 为了实验性地比较WT和FC设备的流体动态行为和排放率估计.
- 提供数据,帮助选择适合的被动区域源的采样仪器.
- 调查大气条件对设备适用性的影响.
主要方法:
- 进行了实地测试,将新型WT与美国环保署设计的FC进行比较.
- 在各种条件下,分析了液体表面附近的大气运动.
- 开发并将理论质量转移模型应用于排放率数据.
主要成果:
- 大气条件可以使流体动力学类似于WT或FC,中间行为是常见的.
- 对于可溶性挥发性有机化合物 (VOC),WT和FC产生了可比的排放率结果.
- 与FC相比,WT倾向于高估低可溶性VOC (气相控制) 的排放量,比FC的排放量高出2至4.5倍.
结论:
- 由于大气条件的变化,无法先验确定最合适的装置 (WT或FC).
- 设备的选择取决于特定的VOC特性 (可溶性) 和环境因素.
- 质量转移模型支持实验发现,除了托卢等非理想混合物的例外.
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