Method evaluation for the nanofiltration of polar organic compounds in caustic solution

Description

Retention of nanofiltration membranes occurs mainly due to three different mechanisms. The first one is the so-called size exclusion mechanism, which is comparable with a sieving effect in meso and macro scale. The second mechanism in NF for diluted systems is electrostatic repulsion. The third mechanism is the solution-/diffusion transport of different charged ionic species. Beside these effects which occur directly in the active membrane layer further parameters affect the separation. Additional hydrodynamic aspects can play even a significant role for the whole separation process. To focus on the separation effects directly in the top layer of membrane, hydrodynamic influences and concentration polarization in the boundary layer must be limited. To fulfill these requirements a new type of flat-sheet testing cell (Figure 1) was used in this present paper.

Period	04 Apr 2018
Event title	Minisymposium der Verfahrenstechnik 2018
Event type	Conference
Location	AustriaShow on map