Porous β-Sialon planar membrane with a robust polymer-derived hydrophobic ceramic surface

Ceramic membranes applied to membrane distillation: A comprehensive review

“…Recent publications have tended to focus on producing novel ceramic materials specifically to MD, rather than on commercial ceramic membranes. Some examples include kaolin [Al 2 Si 2 O 5 (OH) 4 ], silicon nitride with SiNCO nanoparticles (NPs), bi‐layered yttria‐stabilized zirconia (YSZ), β‐Sialon coated with polydimethylsiloxane (PDMS), alumina and clay (kaolin), alumina support and zeolite mordenite framework inverted (MFI), mud of hydrocyclone laundries of phosphates/zirconia, Tunisian clay, green silica‐based ceramic membrane derived from rice husk ash waste, and silicon dioxide‐coated silicon oxynitride . Each publication reported in detail the fabrication of the membrane.…”

“…In addition, selective properties of MD were not compromised. Hydrophobic layer of ceramic membranes was also stable in some solutions, such as boiling water, benzene, humic acid and hydrochloric acid, chlorine, chloroform, and hexane . On the other hand, after long‐time contact with water, some authors reported a decrease in the hydrophobicity level of the grafted ceramic membranes .…”

“…Existing publications of ceramic membranes in MD have been limited only to short‐term operating times, probably due to fouling and wetting issues. The longest operation times were 50, 55, 70, 200, and 500 hours, but more studies on the long‐term operation of ceramic membranes in MD are still needed. The phenomenon of flux decay in MD has been often observed in long‐term operation.…”

“…Many authors reported that feed temperature showed a remarkable influence on the permeate flux with ceramic membranes applied to MD, regardless of configuration and feed solution. This propensity is explained by the Antoine equation, which predicts an exponential relationship between the vapor pressure difference and temperature due to the higher latent heat of water evaporation and higher heat transfer coefficient, without affecting the permeate quality.…”

Production and characterization of durable self‐cleaning and engineering porous Al2O3/CaAl12O19 ceramic membranes

“…Tape‐casting is a well‐established technique, whereby flat ceramics with tailored thickness can be produced . It was used originally to fabricate dense ceramic substrates, but nowadays, it is generally applied to fabricate porous ceramic membranes via its combination with other pore forming methods, such as sacrificial template, partial sintering, phase inversion, and freeze drying . Still, sacrificial template method inevitably gives serious cause for concern about environmental pollution, partial sintering method intrinsically presents difficulties in developing high porosity, and phase inversion and freeze drying methods are generally complex processes for membrane fabrication.…”