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利用水溶液填充平均孔径为0.2μm的ZrO2管式非对称支撑体,水热合成法制备得到了高通量的MCM-48分子筛膜.首先将支撑体浸泡在预先制备的具有一定pH值的水溶液中,负压抽吸以排除支撑体中的气体,然后放入溶胶中水热合成,经乙醇/盐酸溶液(EtOH/HCl)萃取干燥后得到MCM-48分子筛膜.单组分气体(N2,H2)渗透实验表明,利用水溶液填充支撑体与干燥支撑体相比,可以明显改善MCM-48分子筛成膜质量.通过二次合成可以得到高通量、完整的MCM-48分子筛膜,常温、跨膜压差为0.05MPa时N2渗透系数为5.66×10-7mol/(Pa·s·m2),H2/N2分离因子可达到3.47.
A high-throughput MCM-48 zeolite membrane was prepared by hydrothermal synthesis method using an aqueous ZrO2 tubular asymmetric support with an average pore size of 0.2 μm. The support was immersed in a previously prepared aqueous solution with a certain pH value , Negative pressure suction to remove the support gas, and then placed in the sol hydrothermal synthesis, ethanol / hydrochloric acid solution (EtOH / HCl) extraction and drying obtained after MCM-48 zeolite membrane. ) Infiltration experiments show that, using aqueous solution to fill the support compared with the dry support can significantly improve the quality of MCM-48 molecular sieve film formation by secondary synthesis can get high-throughput, complete MCM-48 zeolite membrane, room temperature, transmembrane When the pressure difference is 0.05MPa, the permeability coefficient of N2 is 5.66 × 10-7mol / (Pa · s · m2), and the H2 / N2 separation factor can reach 3.47.