Selective fractionation of particles in multi-parameter potential fields - Multi-Field-Fractionation (M-FF)

SPP第二个学期项目延期提案的主要主题是对气溶胶颗粒系统的多维和多参数分馏和分类，特别是在10 µm以下的尺寸范围内。将开发一种特定的分离方法，在一个步骤过程中分离不同的颗粒特性，如尺寸，形状和材料特性。科学方法还涉及分离特性，例如颗粒的密度和电迁移率。分离过程基于同时应用声场和电场以及在气溶胶中产生的力。在电场内，颗粒分别相对于它们的带电性和空气动力学尺寸被分离。直径.在声场（驻波）中，利用作用于颗粒质量和空气动力学尺寸以及形状和密度的力。由于电场和声场中不同分离特性的重叠，分离过程的目的是针对两个单独的颗粒特性进行分离。在SPP的第二期，将进一步开发数值模拟模型，并用于研究不同的过程配置和过程条件，以提高分离效率和选择性。为了分析气流中的实际相关颗粒负荷，颗粒团聚核需要包括在建模中。与工业相关的颗粒系统将包括在项目工作中。

Main topic of the project extension proposal for the second SPP term is the multidimensional and multiparametric fractionation and classification of particulate systems from aerosols specifically in a size range below 10 µm. A specific separation method will be developed that separates different particle characteristics like size, shape and material properties within a single step process. The scientific approach also addresses separation characteristics for instance as density and electrical mobility of particles.The fractionation process is based on the simultaneous application of acoustic and electric fields and resulting forces in aerosols. Within the electric field the particles are separated with respect to their electric chargeability and the aerodynamic size resp. diameter. In the acoustic field (standing waves) forces are utilized that act on particle mass and aerodynamic size as well as shape and density. Due to the overlap of different fractionation characteristics in electric and acoustic fields, the fractionation process aims to separate with respect to two individual particle characteristics.In the second SPP term the numerical simulation models will be further developed and used to study different process configurations and process conditions in order to enhance the separation efficiency and selectivity. For analysis of practical relevant particle loadings in the gasstream particle agglomeration kernels need to be included in the modeling. Particulate systems of industrial relevance will be included in the project work.