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Keramische Membranen in der Membrandestillation

Ceramic Membranes in Membrane Distillation Processes
: Schnittger, Johann; Weyd, Marcus W.; Voigt, Ingolf; Lerch, André


Chemie- Ingenieur- Technik 152 (2019), S.740-745
ISSN: 0009-286X
ISSN: 1522-2640
Fraunhofer IKTS ()
Liquid entry pressure; Membrane distillation; Titanium dioxide

TiO2 membranes were successfully rendered hydrophobic (modified with perfluoroalkyl silanes) and evaluated by liquid entry pressure (LEP) measurements and membrane distillation (MD) tests. It was shown that the LEP is strongly depended on the pore size of the membranes and the feed composition. The obtained permeate fluxes were highest in vacuum MD. None of the membranes showed any sign of wetting during the experiments and salt retentions greater than 99.9 % were recorded and permeate qualities lower than 2 µS cm−1 were achieved in air gap MD and vacuum MD.