通过陈化前预置载体、更新合成液改进的水热法与传统的原位水热法分别在α-Al₂O₃载体上制备NaA分子筛膜。通过XRD和SEM对2种方法合成的膜进行表征，并利用渗透汽化装置来检测其渗透蒸发性能。实验结果表明，改良的水热法优于传统水热法。改良的水热法制备的NaA分子筛膜晶体量大、覆盖率高，乙醇/水的分离因子为20.2，远远高于传统水热法合成的膜。将在α-Al₂O₃载体上制备的NaA分子筛膜应用于吡啶脱水实验，结果表明，当进料为ω（吡啶）=95%的吡啶水溶液、进料温度为96℃、处理量为1 720 mL/（h·m²）时，可以得到ω（吡啶）=99.61%的吡啶水溶液。

NaA molecular sieve membranes are prepared on the outer surface of tubular α-Al₂O₃ carrier by the traditional in-situ hydrothermal method and the modified in-situ hydrothermal methods separately.The modified in-situ hydrothermal method is improved through aging the carrier tube and the synthetic solution together and renewing a synthetic solution during the crystallization process.The prepared membranes are characterized by XRD and SEM,and their pervaporation performances are evaluated and compared each other via a pervaporation device.The modified in-situ hydrothermal method is verified via experiments to have higher efficiency.NaA molecular sieve membrane prepared through modified method has larger amount of crystal and higher coverage,and its separation factor for C₂H₅OH/H₂O on α-Al₂O₃ support is 20.2,which is much higher than that of membrane made by the traditional in-situ hydrothermal method.The prepared NaA membranes on α-Al₂O₃ carrier are used to carry out dehydration test of pyridine.Results show that a pyridine solution with a purity of 99.61 wt.% can be obtained when the concentration of feedstock pyridine solution is 95 wt.%,the feed temperature is at 96℃,and the treatment capacity is 1 720 mL·h^-1·m^-2.

景一操(1992-),男,硕士研究生,主要从事NaA分子筛膜的制备与应用,1035306676@qq.com