›› 2008, Vol. 8 ›› Issue (1): 187-191.
• 材料工程专栏 • Previous Articles Next Articles
WANG Ai-fang,SUN Wei-guo,KONG Chun-long,ZHAO Qing-yu,YANG Jian-hua,WANG Jin-qu
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王爱芳,孙伟国,孔春龙,赵庆宇,杨建华,王金渠
Abstract: Silicalite-1 zeolite membrane was successfully synthesized on tubular a-Al2O3 support by secondary synthesis with vacuum seeding. The as-prepared seed and membrane were characterized by XRD, SEM, TEM and single-gas permeability measurement. The results indicate that the prepared membrane was a typical Silicalite-1, a continuous and uniform seeding layer was attached to the a-Al2O3 support, the sizes of the Silicalite-1 molecular sieve were 0.2, 0.5, 1 and 2 mm with uniform distribution, and the prepared membrane was dense, regrown and crack-free. The influencial factors of vacuum and seed size were also investigated. At ro
Key words: Silicalite-1 zeolite membrane, vacuum seeding, hydrothermal synthesis, gas permeation
摘要: 采用抽真空法在多孔a-Al2O3载体管表面预先引入Silicalite-1沸石晶种,再通过水热合成二次晶化法在涂有Silicalite-1沸石晶种的a-Al2O3载体管上合成沸石膜. 用X射线衍射(XRD)、扫描电镜(SEM)和透射电镜(TEM)对合成的沸石分子筛及膜进行了表征,考察了晶种大小、真空度对合成沸石膜渗透性能的影响,用单组分气体渗透实验检测合成沸石膜的渗透性能. XRD检测结果表明,制备的沸石膜是典型的Silicalite-1沸石膜,合成的分子筛粒径分别约为0.2, 0.5, 1和2 mm,且分布均匀;SEM检测结果表明引入的晶种涂层连续、均匀,制备的Silicalite-1沸石膜致密、互生,不存在裂缺;常温常压下,H2/N2和H2/SF6的理想分离系数分别达到4.1和133.2,大于其Knudsen扩散比值3.7和8.7.
关键词: Silicalite-1沸石膜, 抽真空法, 水热合成, 气体渗透
WANG Ai-fang;SUN Wei-guo;KONG Chun-long;ZHAO Qing-yu;YANG Jian-hua;WANG Jin-qu. Synthesis of Silicalite-1 Zeolite Membrane with Vacuum Seeding Method and Its Characterization of Performance[J]. , 2008, 8(1): 187-191.
王爱芳;孙伟国;孔春龙;赵庆宇;杨建华;王金渠. 真空晶种引入法制备Silicalite-1沸石膜及其性能表征[J]. , 2008, 8(1): 187-191.
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