采用不含有机模板剂的晶化液在平均孔径为2μm的多孔α-Al2O3管上合成了ZSM-5 沸石膜.纳米ZSM-5沸石晶种的摩尔组成为9TPAOH:25TEOS:0.25 Al2O3:480H2O.多孔α-Al2O3载体管外表面用这些粒度为100nm左右的晶种悬浮液浸涂、干燥后,依据纳米ZSM-5 沸石晶种的DTA/TG进行煅烧,在不含有机模板剂的摩尔组成为67Na2O:Al2O3:240SiO2: 6000H2O晶化液中合成了ZSM-5膜.XRD确定膜晶体为ZSM-5沸石,SEM表明沸石膜无缺陷,膜厚度约为8μm.制备的ZSM-5沸石膜H2的渗透率为1.50×10-6mol·m2·s-1·Pa-1,理想分离因数αH/N2为3.85左右.
ZSM-5 zeolite membranes synthesized on rough porous α-Al2O3 tubes with an average pore size of 2μm in the absence of organic template crystallization gel were investigated. The
molar composition of nanosized ZSM-5 seeds was 9TPAOH: 25TEOS: 0.25 Al2O3: 480H2O. Porous α-Al2O3 tubes were seeded with these colloidal TPA-silicalite-1 crystals with
a size of 90～100nm. The seeded supports were calcined in accordance with DTA/TG of nanosized ZSM-5 and treated in a synthesis sol-gel to grow the seed crystals into ZSM-5 membranes on the outer
surface of porous α-Al2O3 tubes. The molar composition of the crystallization gel without organic templates was 67Na2O:Al2O3: 240SiO2: 6000H2O. XRD patterns show that the
film consists of well-crystallized ZSM-5 zeolite. SEM investigation indicates that the zeolite films on the supports are defect free and that the film thickness is approximately 8μm. The permeability
for H2 is 1.50×10-6mol$·m-2·s-1·Pa-1 and the ideal separation factor for H2/N2 is about 3.85.
参考文献
| [1] | Guan G, Tanaka T, Kusakabe K, et al. Membr. Sci., 2003, 214: 191-198. [2] Richter H, Voigt I, Fischer G, et al. Sep. Purifi. Technol., 2003, 32: 133-138. [3] Pan M, Lin Y S. Micropor. Mesopor. Mater., 2001, 43: 319-327. [4] Gang L, Eiichi K, Masahiko M. Micropor. Mesopor. Mater., 2003, 62: 211-220. [5] Hedlund J, Sterte J, Anthonis M, et al. Micropor. Mesopor. Mater., 2002, 52: 179-189. [6] Lassinantti M, Jareman F, Hedlund J, et al. Catal. Today., 2001, 67: 109-119. [7] Persson E, Schoeman B J , Sterte J , et al. Zeolites., 1995, 15: 611-619. [8] Lai R, Gavalas G R. Micropor. Mesopor. Mater., 2000, 38: 239-245. [9] Travis C B, Jeffrey C W, Richard D N, et al. Microp. Mesop. Mater., 2004, 71: 199-210. [10] 李永生,王金渠,郭树才. 高等学校化学学报, 2000, 21(12): 1812-1814. |
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