ZSM-5分子筛膜/多孔SiSiC陶瓷复合孔结构微反应器的制备  

Oriented ZSM-5 Zeolite Membranes on Biomorphic SiSiC Ceramics for Microreactors

作　　者：罗民[1,2] 王政[1] 王燕[1] 梁军[2] 房俊卓[1] 

机构地区：[1]宁夏大学能源化工国家重点实验室,银川750021 [2]宁夏大学化学化工学院,银川750021

出　　处：《无机材料学报》2009年第2期330-334,共5页Journal of Inorganic Materials

基　　金：国家重点基础研究发展计划"973"专项(2007CB216402);教育部科学技术研究重点项目(203143);宁夏高等学校科研项目(2007)

摘　　要：以生物形态多孔SiSiC陶瓷为载体,采用原位水热法在多孔陶瓷微孔道内壁形成了一层2-5μm厚的b轴取向生长的ZSM-5分子筛膜.利用XRD、SEM-EDX、BET分析对复合材料的相组成、微观结构和比表面积进行了表征,研究了水热晶化时间、载体预处理对原位合成分子筛膜的影响.结果表明,随晶化时间从5h增加到15h,从不连续的单层膜演变到-5μm厚的b轴取向的连续致密多层膜,该膜层是由粒径在1μm左右的ZSM-5分子筛颗粒堆积交联而成.载体表面Si OH浓度越高,分子筛膜和载体的结合力越强,但是较难控制分子筛膜的定向生长.ZSM-5/SiSiC复合孔结构材料的微孔体积为0.015cm^3/g,BET面积为42.8m^2/g,而相应的分子筛负载量为8.6%.Oriented ZSM-5 zeolite membranes on the biomorphic porous SiSiC ceramics were successfully synthesized by in situ hydrothermal synthesis. The ZSM-5/ SiSiC composite materials were characterized by XRD, SEM-EDX and BET. The effects of synthesis time and surface pre-treatment of the beech-derived SiSiC monolith were systematically studied. It shows that a homogeneous coverage within the pores channel of SiSiC monolith by b-oriented ZSM-5 crystals with 1 μm average size is formed after hydrothermal treatment at 150℃ for 15h. The structure composites exhibit a hierarchical pore structure with a BET specific surface area of 42. 8m^2/g and microporous volume of 0. 015cm^3/g. The weight percent of ZSM-5 in the final zeolite/SiSiC composites is about 8.6% after coating.

关 键 词：生物形态多孔陶瓷 分子筛膜 ZSM-5 原位水热合成 

分 类 号：TG146[一般工业技术—材料科学与工程]