用不含有机模板剂的晶化液在多孔α-Al_2O_3管上合成ZSM-5沸石膜  

ZSM-5 Zeolite Membranes Prepared on Porous α-Al_2O_3 Tube from a Template-free Crystallization Gel

作　　者：成岳[1] 王连军[1] 李健生[1] 孙秀云[1] 刘晓东[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《无机材料学报》2005年第6期1488-1492,共5页Journal of Inorganic Materials

基　　金：教育部博士点基金(B20020288015)

摘　　要：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^-6 mol·m^-2·s^-1·Pa^-1 and the ideal separation factor for H2/N2 is about 3.85.

关 键 词：纳米晶种 模板剂 ZSM-5沸石膜 渗透率 

分 类 号：O643[理学—物理化学]