罗灿,张会平,鄢瑛

• 1:华南理工大学化学与化工学院

摘要(Abstract)：

采用化学气相沉积法(CVD)制备了微纤复合Cu-5A/PSSF和Cu-ZSM-5/PSSF分子筛膜催化剂,研究了异丙醇在两种微纤复合分子筛膜催化剂上的催化氧化性能。采用湿法造纸和现代烧结工艺制备了不锈钢微纤预载体,分别采用二次生长法和原位水热合成法在经过表面改性后的不锈钢微纤表面合成ZSM-5和5A分子筛膜,通过化学气相沉积法分子筛膜表面负载Cu元素,得到微纤复合Cu-ZSM-5/PSSF和Cu-5A/PSSF分子筛膜催化剂。N2吸脱附曲线、XRD、SEM和XPS等表征结果表明:所制备的不锈钢微纤预载体形成了发达的三维网状结构,分子筛膜致密均匀地分布在不锈钢微纤载体表面,厚度分别为1.2和1.5μm,Cu O活性组分被均匀的分散在分子筛膜上,实际负载量约为(3.2~3.7)%(wt)。结合异丙醇催化氧化反应的T90看,催化活性为:Cu-ZSM-5/PSSF>Cu-ZSM-5>Cu-5A>Cu-5A/PSSF,其中Cu-ZSM-5/PSSF的T90比Cu-ZSM-5降低了20℃,T50降低了40℃,表明分子筛膜材料的三维网状结构加强了传热与传质;Cu-ZSM-5分子筛催化剂的活性要好于Cu-5A分子筛催化剂,表明ZSM-5比5A分子筛的孔道结构更有利于异丙醇的催化氧化。

关键词(KeyWords)： 微纤复合分子筛膜;化学气相沉积法;异丙醇;催化氧化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21776106)

作者(Author): 罗灿,张会平,鄢瑛

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