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Date of Publication:2022-10-09

Journal:石油化工

Issue:5

Page Number:497-503

ISSN No.:1000-8144

Abstract:Silicalite-1 zeolite membranes were prepared by the modified secondary growth method, in which titanium sol was used as a substitute of water to disperse the zeolite seed crystals. Effects of content of seed crystal in the seed suspension, number of dip-coating times and mole ratio of water to silicon on properties of the Silicalite-1zeolite membranes were investigated. XRD, SEM and single-gas permeation test were used to characterize the prepared membranes. The surfaces of the prepared membranes were continuous and dense without obvious defects. The Silicalite-1zeolite layer and the porous support were well-knitted comparing with conventional secondary growth method. Single-gas permeation tests indicated that at 323 K, 0.1 MPa pressure drop, permeance of H2 and H2/SF6 ideal separation factor of the obtained membrane reached a high level of 7.36�� 10-7mol/(m2��s��Pa) and 28.6, respectively.

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