microwave assisted synthesis of nano zeolite seed for synthesis membrane and investigation of its permeation properties for h2 separation

mfi-type zeolite membranes (zsm-5) were prepared on α-alumina tubular supports and tested for separation of h2/co mixtures. the effect of pressure and temperature on h2 and co flows and selectivity was investigated. the best results in this work were obtained with a zsm-5 membrane prepared over a porous α-alumina tube seeded with zeolite nanocrystals synthesized with microwave technique. in this case the h2 permeance was obtained 2.8 × 10-6  mol/ (m2.s.pa) with a h2/co ideal selectivity of 4.9 at 373 k. the permeation results of four gas (h2, co, n2, ch4) on the synthesized membrane were also investigated.