Dehydration of Natural Gas Using Synthesized Chabazite Zeolite Membranes

Chabazite zeolite membranes were synthesized for their potential application indehydration of natural gas. the membranes were prepared using secondary growthmethod on porous ?-alumina substrates. hydrothermal treatment was applied for thesynthesis of chabazite seeds. the membranes were synthesized at four temperatures of100, 120, 140, and 160°c; and duration of 20 h. separation performance of assynthesized membranes was evaluated through permeation of water vapor and methaneas single gas. moreover, the structure and morphology of as-synthesized chabazite zeolitemembranes as well as seeds were characterized using scanning electron microscopy(sem), x-ray diffraction (xrd), and dynamic light scattering (dls). the results revealedthat the optimum temperature for the synthesis of chabazite membranes is 140°c whileat lower and higher temperatures, lower separation performances were observed. at theoptimum synthesis temperature, an ideal selectivity of 23 was obtained for watervapor/methane, while a thin and integrated chabazite zeolite layer of about 5 ?m inthickness was synthesized over the surface ofalumina substrate.