Abstract
In this work, high performance nanoporous Linde Type A (LTA)-type zeolite membranes were synthesized via secondary growth method. The used substrate for growing membrane layer was porous mullite. To synthesize defect-free zeolite film on porous mullite discs, synthesis duration was optimized for hydrothermal treatment. The morphology and structure of synthesized zeolite membranes were characterized by scanning electron microscopy and X-ray diffraction. The defect-free LTA-type zeolite membranes were obtained at synthesis duration of 3 h and synthesis temperature of 100°C. The separation performance of synthesized LTA-type zeolite membranes were evaluated in dehydration of ethanol using pervaporation process. Influence of feed composition on separation performance of LTA membranes was also investigated. The best membranes showed a separation factor of 9,400 and total flux of 9.8 kg m−2 h−1 for dehydration of 10:90 (wt.%) water/ethanol mixture.
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