Fractionating of finest particles using the crossflow filtration

P. Lösch*, K. Nikolaus, S. Antonyuk, Technische Universität Kaiserslautern, Germany

Fine particles dispersed in a liquid phase with highly specific physical properties are gaining in importance. These suspension are often intermediates for the production of coatings, structured reinforced plastic or for printed electronics.

Production processes like precipitation or crystallization often generate particles with broad particle size distributions. In known separation processes, such as sedimentation, filtration or centrifugation, the particles are either classified according to a certain grain size or sorted by a physical characteristic. However, in many applications in which finely dispersed multicomponent mixtures of particles with sizes < 10 μm with different properties are to be separated in industrially relevant quantities, the usage of a single separating feature is often no longer sufficient. In this research project, a novel cross-sectional superficial electric field filtration technique is being developed, which is a promising method for the highly specific separation of micro- and sub-micron suspensions. The method not only allows fractionation with regard to the particle size, but also the particle shape, the chemical composition and the physical properties of the individual particles.

In this study, the test plant is developed and constructed. Based on CFD-simulations, the flow channels and the size of the filter area were designed. The hydrodynamic forces on the particles in the laminar boundary layer are investigated. The possibility for the use as classification process in the crossflow will be...

Session: L4 - Wet Particle Fractionation
Day: 22 October 2019
Time: 16:45 - 18:00 h

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