膜科学与技术

TS-1分子筛膜制备和催化性能的研究

作者：朱美华，李羚，丁文娟，陈乐，李玉琴，桂田，陈祥树

单位：江西师范大学化学化工学院先进材料研究院江西南昌 330022 江西师范大学化学化工学院分子筛膜材料国家地方联合工程实验室江西南昌 330022

关键词： TS-1分子筛膜； H2O2氧化；渗透汽化

出版年,卷(期):页码： 2018,38(2):45-51

摘要：

采用二次水热合成法在管状莫来石支撑体上制备TS-1分子筛膜，通过 XRD、FT-IR、UV-Vis和SEM 表征技术考察二次水热合成法中浸涂支撑体时晶种悬浮液浓度、合成液中的nH2O2/nSiO2比率、合成液中晶种添加量等对TS-1分子筛膜的生长和催化性能的影响。当合成液的摩尔组分比、晶种液浓度、合成液中的nH2O2/nSiO2比率、溶液中晶种添加量、合成温度和合成时间分别为SiO2:0.03TiO2:0.2TPAOH:120H2O、5 wt%、6、1 wt%、150℃和24 h，连续致密的TS-1分子筛膜在H2O2氧化异丙醇反应中表现出良好的催化性能。其次，在渗透汽化-催化氧化耦合反应过程中，当异丙醇与H2O2摩尔比和反应温度分别为1:2和70 ℃时，异丙醇的转化率达到81.14%，TS-1分子筛膜的通量为2.23 kg·m-2·h-1。

The TS-1 zeolite membrane was synthesized on a tubular mullite support by secondary hydrothermal synthesis. Influences of the concentration of seed crystal suspension, H2O2/SiO2 ratio and crystal seed content in the precursor synthesis solution on growth and catalytic performance of TS-1 zeolite membrane were investigated by XRD and SEM characterization. When the molar ratio of the initial synthesis solution, concentration of seed crystal suspension, H2O2/SiO2 molar ratio and crystal seed content in the precursor synthesis solution, synthesis temperature and synthesis time were SiO2:0.03TiO2:0.2TPAOH:120H2O, 5 wt%, 6, 1 wt%, 150 ℃ and 24 h, respectively, the as-synthesized TS-1 zeolite membrane showed an excellent catalytic performance in the oxidation of iso-propanol and hydrogen peroxide by pervaporation. Besides, when isopropanol/H2O2 molar ratio and reaction temperature in the pervaporation-catalytic oxidation process, were 1:2 and 70 ℃, the iso-propanol conversion and flux of the TS-1 zeolite membrane were 81.14% and 2.23 kg·m-2·h-1, respectively.

第一作者简介：朱美华（1985年8月），女，江西景德镇人，工学博士，副教授，研究方向为分子筛膜的制备与应用，E-mail：zhumeihua@jxnu.edu.cn 通讯作者：陈祥树，E-mail： cxs66cn@jxnu.edu.cn

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