连续致密LTA分子筛膜对痕量TNT爆炸物气氛的浓缩  

TNT Vapor Concentration Based on the Continuous and Compact LTA Zeolite Membranes

作　　者：郭亚楠[1] 宫淼淼[1] 窦新存[1] GUO Yanan;GONG Miaomiao;DOU Xincun(Xinjiang Key Laboratory of Explosives Safety Science,Laboratory of Environmental Science and Technology,Key Laboratory of Functional Materials and Devices for Special Environments;Xinjiang Technical Institute of Physics&Chemistry,Chinese Academy of Sciences,Urumqi 830011,China)

机构地区：[1]中国科学院新疆理化技术研究所爆炸物安全科学自治区重点实验室环境科学与技术实验室中国科学院特殊环境功能材料与器件重点实验室,乌鲁木齐830011

出　　处：《高等学校化学学报》2018年第12期2637-2643,共7页Chemical Journal of Chinese Universities

基　　金：中国科学院西部之光项目(批准号:XBBS201401);国家自然科学基金(批准号:21401213)资助

摘　　要：采用晶种浆料刮擦法在多孔α-Al_2O_3陶瓷管载体表面制备了连续致密的LTA分子筛膜,并设计了基于致密分子筛膜的2,4,6-三硝基甲苯(TNT)爆炸物蒸气浓缩装置,利用分子筛孔径尺寸与TNT分子动力学半径的差异对TNT进行浓缩,提高密闭空间内TNT分子的浓度.采用静态扩散和动态浓缩2种方式评价了LTA型分子筛膜对TNT气氛的分离浓缩效果.The continuous and compact LTA zeolite membranes were prepared onα-Al2O3 support via a rubbing-shaving seeding method and then further fabricated into a concentrator to concentrate 2,4,6-trinitrotoluene(TNT)vapor utilizing the kinetic radius difference between the gas and the pore size of molecular sieves.The diffusion limit enable the TNT vapor to be trapped in the confined space of concentrator,with a concentration factor of 31.8 evaluated under static and dynamic conditions.Such concentration method based on compact molecular sieve membranes is of great significance for the real-time and ultrasensitive detection of TNT vapor.

关 键 词：LTA分子筛膜 气氛浓缩 TNT爆炸物气氛 

分 类 号：O611[理学—无机化学]