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Combined measurement of aerodynamic and mobility diameter for the online determination of agglomerate morphology

空气动力学和流动直径的联合测量用于在线测定附聚物形态

基本信息

批准号：
220590379
负责人：
Professor Dr.-Ing. Frank Einar Kruis
金额：
--
依托单位：
Abteilung GCP/TP - L540
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2012
资助国家：
德国
起止时间：
2011-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/220590379?language=en
关键词：
Combined measurement aerodynamic mobility diameter

项目摘要

In the first period of the project, a new classifier (Differential Aerodynamic Particle Sizer, DAPS) for aerosol particles based on their aerodynamic diameter in the range of 100 nm to 5 µm has been developed. For the second period of the research project, dedicated experiments will be carried out concerning the physics behind aerodynamic focusing and its dependency on pressure, gas velocity, gas composition and particle density. A combination of the DAPS system with the optical measurement techniques developed in the projects TP2 and TP4 which yield the radius of gyration is scheduled. The combination of these measurements both in parallel as well as in series allows a mutiparameter evaluation of the particles, especially useful when the particle materials precludes LII measurements of the primary particle size which are however possible with the DAPS system as the Stokes diameter is strongly depending on the primary particle size. Furthermore, it is planned to optimize the system for industrial application. This will be achieved by adding an optical single particle counter to the electrical particle detection and by extending the minimal range of the aerodynamic diameter from 100 nm to 30 nm. Online measurements of the particle structure will then be conducted for production processes with the industrial partners.

在该项目的第一阶段，已经开发了一种新的气溶胶颗粒分级装置(DAPS)，该分级装置根据气溶胶颗粒的空气动力学直径在100纳米到5微米的范围内对其进行分级。在研究项目的第二阶段，将开展专门的实验，研究气动聚焦背后的物理原理及其对压力、气体速度、气体成分和颗粒密度的依赖关系。计划将DAPS系统与项目TP2和TP4中开发的光学测量技术相结合，以产生回转半径。这些并行和串联测量的组合允许对颗粒进行多参数评估，特别是当颗粒材料排除了初级颗粒尺寸的LII测量时，这一点对于DAPS系统是可能的，因为斯托克斯直径强烈依赖于初级颗粒尺寸。此外，还计划为工业应用优化该系统。这将通过在电子颗粒检测中增加光学单粒子计数器和将空气动力学直径的最小范围从100 nm扩展到30 nm来实现。然后将与工业合作伙伴一起对生产过程中的颗粒结构进行在线测量。