| 两步变温法微米晶种诱导合成高性能的T型分子筛膜 |
| |
| 引用本文： | 张小亮,宋 鑫,邱灵芳,周荣飞,陈祥树.两步变温法微米晶种诱导合成高性能的T型分子筛膜[J].无机化学学报,2012,28(9):1914-1918. |
| |
| 作者姓名： | 张小亮 宋 鑫 邱灵芳 周荣飞 陈祥树 |
| |
| 作者单位： | 江西省无机膜材料工程技术研究中心,江西师范大学化学化工学院,南昌 330022 |
| |
| 基金项目： | 国家自然科学基金(No.20906042,20966003,21106059);国家“863”计划(No.2012AA03A609);国家重大国际合作研究(No.2010DFB52950);江西省科技支撑计划(No.2010BGA01200)资助项目 |
| |
| 摘 要： | 在预涂自制微米晶种的多孔管状莫来石支撑体表面上,采用两步变温法诱导合成T型分子筛膜。在溶胶配比nSiO2∶nAl2O3∶nNa2O∶nK2O∶nH2O=1∶0.05∶0.3∶0.1∶30合成条件下,通过变温晶化过程成功制备出高性能的T型分子筛膜。XRD和SEM结果表明,该法可在支撑体表面上较快地形成一层连续致密的纯相T型分子筛膜层,较大缩短了膜合成时间和提高了膜致密性。在优化条件下所合成的膜具有优异的渗透汽化性能,且膜制备的重复性良好。75℃时,在水/异丙醇(10/90,w/w)混合物体系中膜的渗透通量和分离因子分别高达4.25 kg.m-2.h-1,7600;在水/乙醇(10/90,w/w)混合物体系中膜的渗透通量和分离因子分别为2.87 kg.m-2.h-1,1 900。
|
| 关 键 词： | T型分子筛膜 两步变温合成法 二次生长法 渗透汽化 |
Preparation of High Performance Zeolite T Membranes by a Two-Stage Temperature-Varied Synthesis with Microsized Seeds |
| |
| ZHANG Xiao-Liang,SONG Xin,QIU Ling-Fang,ZHOU Rong-Fei and CHEN Xiang-Shu.Preparation of High Performance Zeolite T Membranes by a Two-Stage Temperature-Varied Synthesis with Microsized Seeds[J].Chinese Journal of Inorganic Chemistry,2012,28(9):1914-1918. |
| |
| Authors: | ZHANG Xiao-Liang SONG Xin QIU Ling-Fang ZHOU Rong-Fei and CHEN Xiang-Shu |
| |
| Institution: | Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China,Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China,Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China,Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China and Jiangxi Inorganic Membrane Materials Engineering Research Centre, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China |
| |
| Abstract: | Zeolite T membranes were prepared by a two-stage temperature-varied hydrothermal technique with microsized seeds on the surface of the porous mullite supports.Under the typical synthesis solution of nSiO2:nAl2O3:nNa2O:nK2O:nH2O =1:0.05:0.3:0.1:30,the zeolite T membranes with high permeation performance were successfully synthesized by the two-stage temperature-varied crystallization process.The results of XRD and SEM showed that a continuous and dense T-type zeolite layer formed on the surface of the support.The two-stage temperature-varied synthesis method leads to shorten crystallization time and improved membrane density.The as-synthesized zeolite membranes exhibited high pervaporation performance and high-reproducibility of preparation procedure.The permeation flux and separation factor of the membrane were obtained over 4.25 kg.m-2.h-1 and 7 600 for water/i-propanol(10/90,w/w) mixtures at 75 ℃,respectively.Moreover,the permeation flux of the membrane up to 2.87 kg.m-2.h-1 and separation factor over 1900 were achieved for water/ethanol(10/90,w/w) mixtures at the same operation conditions. |
| |
| Keywords: | zeolite T membrane two-stage temperature-varied synthesis secondary growth pervaporation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《无机化学学报》浏览原始摘要信息 |
| 点击此处可从《无机化学学报》下载免费的PDF全文 |
|
