Synthesis of small crystal polycrystalline mordenite membrane |
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Authors: | Yanfeng Zhang Zhongqiang Xu Qingling Chen |
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Institution: | a Department of Chemistry, East China University of Science and Technology, P.O. Box 649, 130 Mei Long Road, 200237, Shanghai, PR China b Shanghai Research Institute of Petrochemical Technology, North Pudong Road 1658, 201208, Shanghai, PR China |
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Abstract: | Mordenite membrane was prepared on -Al2O3 tube by in situ hydrothermal synthesis with tetraethylammonium bromide (TEABr) as template agent. By the application of aging process of the parent solution, the size of mordenite crystals could be remarkably reduced from 20–30 (without aging) to 4–5 μm. The small crystal mordenite membrane had higher performance of pure gas permeation than big crystal mordenite membrane. The ideal selectivity of H2/N2 was 9.80, much higher than 3.82 of big crystals mordenite membrane. The membrane displayed high water-permselective performance in pervaporation (PV) test toward water/organic liquid mixtures. The highest separation factors achieved toward water/methanol, water/ethanol, water/n-propanol and water/i-propanol were 2600 (XW=50%, T=323 K), 5500 (XW=50%, T=343 K), 6000 (XW=15%, T=343 K) and 6800 (XW=50%, T=343 K), respectively. |
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Keywords: | Zeolite membrane Mordenite Hydrothermal synthesis Separation Aging |
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