摘要
以多孔炭管为载体,采用预涂晶种二次生长法在澄清溶液体系制备了炭基-Silicalite-1 沸石复合膜．XRD、SEM及气体渗透性能表明:合成的炭基-沸石复合膜完整、致密,在室温下,H2／C3H8的理想分离因数达到了13．6,显示出明显的分子筛分性能．沸石直接在无晶种层的炭表面上不易生长成膜,而具有晶种层的炭表面可形成连续沸石膜．用弱极性的乙醇代替常规的水作为晶种溶剂可有效地将晶种引入到非极性的炭表面而形成连续、均匀的晶种涂层．在氮气气氛、793K下焙烧,可以除去复合膜中的有机胺模板剂,并避免炭载体结构的氧化破坏．
The zeolite silicalite-1 composite membranes on porous carbon tubes were successfully prepared by using a simple seeded synthesis from clear solutions. SEM, XRD and single gas permeation characterization indicate that the membrane is dense, free-defected and shows good permeation properties. H2/C3H8 ideal selectivity for the membrane is over 15 at room temperature. Zeolite seeds are easily introduced into the porous carbon surface by a slip-casting technique from seed ethanol solution instead of water solution. The continuous seed layer on the carbon support favors the formation of the perfect membrane. The organic template from the composite membrane can be removed by calcination at 793K under nitrogen flow. This opens up the route for the preparation of carbon-zeolite films on porous carbon materials and also develops a novel method for tailoring and improving carbon pore structure of porous carbon materials.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第1期204-210,共7页
Journal of Inorganic Materials
基金
辽宁省高校石油化工技术与装备重点实验室开放基金(PTE-0402)校留学回国人员科研启动经费(1000-893305)
关键词
沸石膜
多孔炭材料
沸石
无机膜
zeolite membrane
porous carbon
zeolite
inorganic membrane
