Flow Cell for Nanofiltration (NF) Membrane Testing, CNFMTFC
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A nanofiltration (NF) flow cell is a specialized laboratory apparatus used to test the performance of nanofiltration membranes on a small scale. Unlike dead-end stirred cells, flow cells operate using crossflow (tangential) filtration, which mimics industrial-scale spiral-wound elements by sweeping the feed across the membrane surface to reduce "concentration polarization" and fouling
In a flow cell, a pressurized feed solution is pumped across the surface of a flat-sheet membrane coupon. (1) Permeate: The liquid that passes through the membrane. In NF, this usually contains water and monovalent ions (like Na+ or Cl-). (2) Retentate (Concentrate): The portion of the feed that does not pass through. it carries away the rejected multivalent ions (like Ca^{2+} or Mg^{2+}) and organic molecules. (3) Crossflow Velocity: The speed at which the fluid travels across the membrane. Higher velocities help "scrub" the membrane surface, preventing the buildup of a cake layer.
| Part Number |
CNFMTFC (C-NFMT-FC) |
| Structure/Components |
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| Testing Membrane Sizes |
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| Assembling Diagram |
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| Flow Pump (Optional) |
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| Note | The cell components should be thoroughly cleaned and dried after use. |
References:
1. K. Boussu, et al., Characterization of polymeric nanofiltration membranes for systematic analysis of membrane performance, J. Membrane Sci., 2006, 278, 418-427.
2. A. Imbrogno, et al. Comparative study of nanofiltration membrane characterization devices of different dimension and configuration (cross flow and dead end), J. Membrane Sci., 2019, 585, 67-80.