Ceramic Vs Polymeric Membranes

They are used in membrane operations for liquid filtration.

Ceramic vs polymeric membranes.

Ceramic membranes consist of metal aluminum or titanium and non metal oxides nitride or carbide. Ceramic membranes have been hailed for their advantageous properties when compared to polymeric membranes. They are generally used for highly acidic or basic environments due to inertness. By contrast with polymeric membranes they can be used in separations where aggressive media acids strong solvents are present.

Additionally ceramic membranes are ideal for in place chemical cleaning at high temperatures while using caustic chlorine hydrogen peroxide ozone and strong inorganic acids and or by using steam sterilization. This makes these membranes suitable for many applications where polymeric and other inorganic membranes cannot be used. So the membrane replacement component of the opex is then approximately proportional to the ratio of the membrane cost l to the net flux j times the membrane life t. Polycera membranes offer a unique combination of extreme hydrophilicity permeability and robustness.

Ceramic membranes are produced from inorganic materials such as aluminium oxides silicon. I a relatively narrow pore size distribution and higher porosity resulting in better separation characteristics and a higher flux ii a higher mechanical stability allowing. It can be made from organic or inorganic materials including solids such as metal or ceramic homogeneous films polymers heterogeneous solids polymeric mixes mixed glasses and liquids. Opex l j t this means that as far as the cost effectiveness of the ceramic membrane compared with the polymeric one is concerned the determining factor is the ratio of the term l j t for the two materials.

A number of different polymeric and ceramic materials are used to form membranes. Synthetic membrane can be fabricated from a large number of different materials. Improved hydrophilicity means improved fouling resistance and ease of cleaning ultimately more water and less cost. Katie guerra p e of the bureau of reclamation reported on her efforts to put to the test the common assumptions that ceramic micro and ultrafiltration systems though more robust and forgiving have such a high capital cost that polymeric membrane systems provide a lower total operating cost advantage.

The downside of ceramic membranes is the high sensitivity to temperature gradient which leads to membrane cracking. Comprehensive membrane science and engineering second edition 2017. Ceramic membranes are a type of artificial membranes made from inorganic materials such as alumina titania zirconia oxides silicon carbide or some glassy materials. There are mainly two different types of membrane material.

Membrane types and structure. Polycera goes beyond traditional polymeric and ceramic materials.