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Permselectivity pilot

The permselectivity (PS) pilot is the ideal lab-scale solution for R&D or quality control on electrodialysis membranes. The PS test cell is equipped with a mV sensor. Based on the potential measurement and the theoretical calculation of the expected potential, the permselectivity can be calculated.

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Typical Specifications*

*Other configurations available on request

Permselectivity flowsheet

Permselectivity pilot

The permselectivity (PS) pilot is the ideal lab-scale solution for R&D or quality control on electrodialysis membranes. The PS test cell is equipped with a mV sensor. Based on the potential measurement and the theoretical calculation of the expected potential, the permselectivity can be calculated.

When  an  ion  exchange  membrane  is  in  a  contact  with  an  electrolyte (salt solution), ions with the same charge (co-ions) as the fixed ions are excluded and cannot pass through the membrane, while the oppositely charged ions (counter ions) can pass freely through the membrane. The permselectivity of a membrane describes the charge selectivity of the ion exchange membrane. It reflects the ability of the membrane to discriminate between ions of opposite charge.

Process description

The Convergence Inspector Permselectivity has been designed in order to test ion exchange membranes with a flow to both surfaces of the membrane. In order to control the flow’s temperature the system is equipped with a heater, which will be internally measured.

The user-friendly software allows all parameters to be logged, to create PDF reports automatically.