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Microporous inorganic membranes for gas separation and purification

TitleMicroporous inorganic membranes for gas separation and purification
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2018
AuthorsDe Meis, D., Richetta M., and Serra Emanuele
JournalInterCeram: International Ceramic Review
KeywordsAir purification, Alumina, aluminum oxide, Ceramic materials, Ceramic membranes, Crystalline materials, Gas permeable membranes, Gas permeance, Gas separations, Gas transport mechanisms, Gases, Membrane surface modifications, Microporous inorganic membranes, Molecular sieving properties, Organometallics, Porous membranes, Pressure and temperature, Separation, Silica, Zeolites, Zirconia

The importance of inorganic membranes for gas separation and purification is analyzed. Although the cost of inorganic membranes is higher than that for polymeric membranes, they have higher permeance, selectivity and better resistance to higher pressure and temperature. The main materials used for porous inorganic membranes are alumina (Al2O3), silica (SiO2), zirconia (ZrO2), zeolite and carbon. Ceramics are compounds of metallic and non-metallic elements. They generally have a macroporous support, an intermediate layer and a small porous top layer. Because the Knudsen gas separation regime has a very low selectivity, various membrane surface modification techniques have started to be experimented with at a number of laboratories. The research focuses on materials that exhibit molecular sieving properties, such as silica, zeolites, MOFs (metal-organic frameworks), graphene and carbon. Finally, gas transport mechanisms through porous membranes are summarized. © 2018, Springer Fachmedien Wiesbaden. All Rights Reserved.


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Citation KeyDeMeis201816