Lüken, Arne ; Stüwe, Lucas ; Lohaus, Johannes ; Linkhorst, John ; Wessling, Matthias (2021)
Particle Movements Provoke Avalanche-like Compaction in Soft Colloid Filter Cakes.
In: Scientific Reports, 11 (1)
doi: 10.1038/s41598-021-92119-w
Article, Bibliographie
Abstract
During soft matter filtration, colloids accumulate in a compressible porous cake layer on top of the membrane surface. The void size between the colloids predominantly defines the cake-specific permeation resistance and the corresponding filtration efficiency. While higher fluxes are beneficial for the process efficiency, they compress the cake and increase permeation resistance. However, it is not fully understood how soft particles behave during cake formation and how their compression influences the overall cake properties. This study visualizes the formation and compression process of soft filter cakes in microfluidic model systems. During cake formation, we analyze single-particle movements inside the filter cake voids and how they interact with the whole filter cake morphology. During cake compression, we visualize reversible and irreversible compression and distinguish the two phenomena. Finally, we confirm the compression phenomena by modeling the soft particle filter cake using a CFD-DEM approach. The results underline the importance of considering the compression history when describing the filter cake morphology and its related properties. Thus, this study links single colloid movements and filter cake compression to the overall cake behavior and narrows the gap between single colloid events and the filtration process.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Lüken, Arne ; Stüwe, Lucas ; Lohaus, Johannes ; Linkhorst, John ; Wessling, Matthias |
| Type of entry: | Bibliographie |
| Title: | Particle Movements Provoke Avalanche-like Compaction in Soft Colloid Filter Cakes |
| Language: | English |
| Date: | 2021 |
| Publisher: | Nature Publishing Group |
| Journal or Publication Title: | Scientific Reports |
| Volume of the journal: | 11 |
| Issue Number: | 1 |
| DOI: | 10.1038/s41598-021-92119-w |
| Abstract: | During soft matter filtration, colloids accumulate in a compressible porous cake layer on top of the membrane surface. The void size between the colloids predominantly defines the cake-specific permeation resistance and the corresponding filtration efficiency. While higher fluxes are beneficial for the process efficiency, they compress the cake and increase permeation resistance. However, it is not fully understood how soft particles behave during cake formation and how their compression influences the overall cake properties. This study visualizes the formation and compression process of soft filter cakes in microfluidic model systems. During cake formation, we analyze single-particle movements inside the filter cake voids and how they interact with the whole filter cake morphology. During cake compression, we visualize reversible and irreversible compression and distinguish the two phenomena. Finally, we confirm the compression phenomena by modeling the soft particle filter cake using a CFD-DEM approach. The results underline the importance of considering the compression history when describing the filter cake morphology and its related properties. Thus, this study links single colloid movements and filter cake compression to the overall cake behavior and narrows the gap between single colloid events and the filtration process. |
| Uncontrolled Keywords: | Biomedical materials, Chemical engineering, Mechanical properties |
| Divisions: | 16 Department of Mechanical Engineering 16 Department of Mechanical Engineering > Chair for Process Engineering of Electrochemical Systems |
| Date Deposited: | 13 Sep 2023 11:13 |
| Last Modified: | 13 Sep 2023 11:13 |
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