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NaA zeolite membranes composed of a continuous intergrowth of NaA zeolite crystals had been synthesized hydrothermally on the surface of a porous tubular support (12 mm outer diameter, 80 cm length and 1 μm average pore size). The membrane was highly selective for permeating water preferentially with the high permeation flux in pervaporation (PV) and vapor permeation. Thus, the first large-scale PV...