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- W2380761284 abstract "Zeolite NaA membrane was prepared hydrothermally on the outer-surface of a porous a-alumina tube (pore size of 3~5 mm) using a gel with the composition of SiO2:Al2O3:Na2O:H2O=2:1:2:200 (mole ratio). Before the hydrothermal reaction, the support was seeded with NaA zeolite, which was already dispersed in diluted water glass. After several hydrothermal synthesis steps, a dense intergrown zeolite crystal layer about 15~20 mm in thickness was formed on the outer surface. The zeolite crystals were about 3~5 mm in size and there was no apparent cracks between them, as observed from SEM images and permeation measurement. The permeance of H2 and N2 was 3.0510-6 and 4.410-7 mol/(m2sPa), respectively. The permselectivity of H2/N2 and H2/C3H8 was 6.9 and 15.6 under room temperature, higher than the respective Knudsen diffusion ratio of 3.74 and 4.69." @default.
- W2380761284 created "2016-06-24" @default.
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- W2380761284 date "2003-01-01" @default.
- W2380761284 modified "2023-09-23" @default.
- W2380761284 title "Preparation of Zeolite NaA Membrane on Rough Porous a-Al_2O_3 Tube" @default.
- W2380761284 hasPublicationYear "2003" @default.
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