沸石晶种层形成的影响因素及其对Silicalite-1型-高校化学工程学报.PDF

20 4 No.4 Vol.20 2006 8 Journal of Chemical Engineering of Chinese Universities Aug. 2006 1003-9015(2006)04-0520-07 Silicalite-1 1 2 2 1 , , , (1. ; 2. , 116012) Silicalite-1 SEM XRD (600 nm 2.2 µm) TB383 O648.22 A Factors Affecting the Formation of Zeolite Seed Layers on Different Porous Supports and Effects of Seed Layers on the Growth of Zeolite Membranes ZHANG Xiong-fu1 2 2 1 , LIU Hai-ou , WANG An-jie , WANG Jin-qu (1.Department of Chemical and Technology, Dalian University of Technology; 2.Department of Catalytic Chemistry and Engineering, Dalian University of Technology, Dalian 116012, China ) Abstract: By using the slip-casting technique, the formation of silicalite-1 seed layers on porous carbon support with 0.5 µm pore size and A1 O supports with different pore sizes(0.1 µm and 4 µm) were studied. The 2 3 effects of support property, seed size and solvent on the formation of seed layers were investigated in detail. The growth of silicalite-1 membranes on different seeded supports by hydrothermal synthesis was also evaluated. The SEM and XRD characterizations indicate that a continuous seed layer can be obtained on the smooth support with 0.1µm pore size by using any seed of 100 nm, 600 nm or 2.2 µm in size, whereas, on the coarse supports with either 0.5 µm or 4 µm pore size, a continuous seed layer can not be formed by using the above seed sizes and the same seeding time. At a longer contacting time, a