SHAPING OF MULTILAYER CERAMIC MEMBRANES BY DIP COATING

For the development of new ceramic membranes for gas separative and ca talytic membrane reactors, multilayer membranes were synthesized. Thes e membrane configurations consist of three layers: a porous support (0 .1 mu m < pore size < 0.4 mu m), a mesoporous gamma-Al2O3 interlayer a nd a gas separative top layer. Different materials for the top layer a re being considered. In this contribution, the characterization of the membranes and the optimization of the manufacturing route for the dif ferent material layers are discussed. Some special attention was given to the development of an alternative porous support, adapted from a R eaction Bonded Al2O3 (RBAO)-process and to the tailoring of the pore t exture of the gamma-Al2O3 interlayer. Preliminary dip coating experime nts proved that the formation of a thin clay or pillared clay layer on an (alpha + gamma)-Al2O3 support is possible. (C) 1996 Elsevier Scien ce Limited.