基于纯硅沸石修饰层的钯复合膜制备方法研究  

Preparation of palladium composite membrane supported on macroporous α-Al_2O_3 tube modified with zeolite silicalite-1 layer

作　　者：郭宇[1] 张雄福[1] 邹红叶[1] 刘海鸥[1] 王金渠[1] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,辽宁大连116012

出　　处：《现代化工》2009年第S1期196-199,共4页Modern Chemical Industry

基　　金：国家自然科学基金项目(20673017);中石油科技创新基金项目(2008D-5006-05-06)联合资助

摘　　要：以大孔α-Al2O3陶瓷管(平均孔径为3μm)为载体,采用水热合成法在其表面形成一层纯硅沸石(Silicalite-1)修饰层,利用化学镀法在经过纯硅沸石修饰后的载体表面成功制备出致密钯复合膜,钯膜厚度约为5μm。利用SEM对复合膜的结构和形貌进行了分析,并在350～500℃范围内对基于纯硅沸石修饰层的钯复合膜进行气体渗透测试表明,该沸石层修饰法制备的钯复合膜具有良好的氢渗透性,在500℃时,氢气渗透通量可达为0.12mol/(m2.s),理想气体分离因子α(H2/N2)达到420。并对该钯膜与在载体表面直接制备的钯复合膜性能的差异进行了讨论。Macroporous α-Al2O3 tubes as supports are modified with zeolite silicalite-1 layer by hydrothermal treatment.A dense palladium membrane with thickness of around 5 μm is successfully deposited on the modified support.Comparison between palladium membrane prepared directly on the support and that on the modified support is carried out.In addition,the structure and morphology of palladium composite membranes are characterized by SEM.It is indicated that a dense palladium membrane can be hardly obtained on a marcroporous support directly.The gas permeation performance is tested at the temperature range of 350-500℃.At 500℃,the highest hydrogen flux of 0.12 mol·m-2·s-1 can be obtained,correspondingly the ideal separation factor α(H2/N2) is up to 420.

关 键 词：无机膜 钯膜 沸石 氢气分离 化学镀 

分 类 号：TB383.2[一般工业技术—材料科学与工程]