Journal article
A new static mixer concept for enhanced desalination performance in flow-electrode capacitive deionization (FCDI) systems
Desalination, v 566, 116887
15 Nov 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Poor electrical conductivity and high pumping energy cost are two major challenges that limit the desalination performance of flow-electrode capacitive deionization (FCDI) systems. In this study, we address these limitations by utilizing low carbon loading suspensions (≤2 wt%) with water-like viscosity in a novel static mixer design, referred to as a membrane-assisted static mixer (MASM). MASMs improved the electrical conductivity of the slurry by minimizing the charge transport distances between the active material and current collector as the ion-exchange membrane was compressed directly against the current collector surface (i.e., zero-gap flow field). Continuous mixing of the active material was achieved by controlling the displacement of the membrane via pressure fluctuations from the peristaltic pumps. A parametric study of three MASM flow field geometries was performed at varying flow rates of 1, 3, 5, 10, 15 and 25 mL min−1 and 0.5, 1, and 2 wt% activated carbon (AC). The best-performing flow configuration (2 wt% AC and 15 mL min−1) showed a high salt removal rate of 4.424 μg NaCl cm−2 s−1 with a total energy consumption of 98.95 kJ mol−1.
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Details
- Title
- A new static mixer concept for enhanced desalination performance in flow-electrode capacitive deionization (FCDI) systems
- Creators
- Jonathan C. Ehring - Drexel UniversityAli Vala Mizrak - Drexel UniversityLutfi Agartan - Drexel UniversityBilen Aküzüm - Lawrence Berkeley National LaboratoryE. Caglan Kumbur - Drexel University
- Publication Details
- Desalination, v 566, 116887
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:001059660000001
- Scopus ID
- 2-s2.0-85167811687
- Other Identifier
- 991021011262704721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Chemical
- Water Resources