Hits:

Date of Publication:2022-10-10

Journal:化工学报

Issue:4

Page Number:987-991

ISSN No.:0438-1157

Abstract:Respectively in the systems of pyrrodine and 1-Butylamine as templates, ZSM-35 type zeolite membranes were hydrothermally synthesized originally in situ on the outer surface of porous α-Al2O3 tubes with pore size of 3-5 μm. Characterization of the as-prepared membranes with XRD and SEM showed that the prepared membranes were typical zeolite ZSM-35 membranes, on which the zeolite crystals grew interlockedly and compactly and covered completely the outer surface of the ceramic tubes with thickness of about 12-18 μm, and that templates with different structures influenced apparently the morphology of the as-prepared membranes; calcinations of as-synthesized membranes at different temperatures indicated the orientation of crystals on the as-prepared membranes tended to be along (h 0 0) direction with increasing calcination temperatures; and at ambient temperature, H2, N2 and C3H8 single component permeance tests of the membranes reached the order of magitude 10-6 with H2/N2 and H2/C3H8 selectivity factors respectively above their corresponding ideal Knudsen diffusion factors.

Note:新增回溯数据