Data underlying research for Effect of flow attack angle on spacer-induced electrokinetics in electrodialysis

doi: 10.4121/2e540aef-452e-47ec-92db-9b9792830d3a.v1
The doi above is for this specific version of this dataset, which is currently the latest. Newer versions may be published in the future. For a link that will always point to the latest version, please use
doi: 10.4121/2e540aef-452e-47ec-92db-9b9792830d3a
Datacite citation style:
Lammertink, Rob; Paul, Arputha; Wood, J.A. (Jeffery) (2023): Data underlying research for Effect of flow attack angle on spacer-induced electrokinetics in electrodialysis. Version 1. 4TU.ResearchData. dataset.
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Spacer geometry plays an important role in membrane separation processes. In electrodialysis, spacer geometry affects not only the pressure-driven flow but can also possibly influence the local electric-field profile and with that the induced electro-osmotic flow by the spacer. 

We previously demonstrated that using polyelectrolyte-coated spacers gave higher ionic currents for the same driving force, underscoring the additional electro-osmotic mixing from using spacers with charged surfaces. In this study, we expand this work to check the effect of electro-osmotic mixing in combination with spacers having different flow attack angles. We have compared, experimentally, the performance of ED using surface-charged spacers with three different flow attack angles. Our results showed that the spacers with 45$\degree$ flow attack angle outperformed the spacers with 30$\degree$ and 90$\degree$ flow attack angle when using uncoated spacers for certain applied voltage (3 to 8V). On the other hand, an improved effect of a charged coating was mostly observed for the spacer with a 45$\degree$ flow attack angle.

  • 2023-09-08 first online, published, posted
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University of Twente, Department Soft matter, Fluidics and Interfaces


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