Zeolite T membrane possesses good acid-resistance with excellent hydrophilic properties as compared to NaA zeolite membrane and can be extended to industrial organic dehydrations under an acidic environment. In the present review the research advances in development of zeolite T membranes for the ...
Mixed matrix membranes (MMMs) could provide a solution to the permeability and selectivity trade-off in polymeric membranes and bridge the gap with inorganic membranes. MMM could offer the physicochemical stability of a ceramic material while ensuring th
The application of zeolite membranes to dehydration process has been realized for ten years with the LTA type membrane [1], followed by many studies to develop the higher permeating fluxes and practical fabrication methods [e.g., 2] and by technologies of vapour permeation (VP) in an ethanol...
and water permeated through the membrane selectively. The permeation flux andseparation factor were 1.9kgm−2h−1and 9300, respectively, for an equimolar mixture of ethanol andwater at 350K. Furthermore, the membranes were used for the dehydration of several...
Encyclopedia of Membranes Reyes Mallada The best performance in pervaporation for water dehydration corresponds to zeolite A, which is the zeolite with the lowest Si/Al ratio (equal to 1) and therefore the highest hydrophilicity. However, the high aluminum content of this zeolite makes it unstable...
Organic dehydration Type-A zeolite membranes are nearly ideally suited for organic dehydration because they are highly hydrophilic and their XRD pore diameter (0.4 nm) is smaller than almost all organic molecules but larger than water. The A-type membranes that have been prepared also have non-zeo...
In this research, dehydration of water/1-1-dimethylhydrazine (UDMH) mixtures by zeolite NaA and hydroxy sodalite membranes has been investigated. Support of these membranes has been tubular mullites that have been made by extruding a mixture of about 67–75% kaolin clay and 33–25% distilled ...
Zeolite membranes are widely used for the dehydration of alcohol via pervaporation. This paper presents a post-synthesis atmospheric-pressure plasma jet (APPJ) treatment aimed at enhancing the water/ethanol separation factor for FER, MOR, and FER-MOR hybrid zeolite membranes. APPJ treatment was sho...
High flux zeolite membranes (> 1 mol s(-1)m(-2)) with a sub-micrometer thickness are mechanically stabilized by a porous, often multilayer, support. Transport mechanisms in zeolite layer and support, however, are counteracting regarding selectivity, and a support may also act as a flux ...
The effects of the seed suspension concentrations, the seed sizes and coating temperature on the morphology of the seed layer and the separation performance of the resulting NaA membranes were investigated. The reproducibility of the VTHD method was as high as 70%. The zeolite NaA membrane ...