Zeoilte T crystals were synthesized by microwave heating and could be crystallized well within 8 h when the template was added in the gel. Compared with the conventional heating method, not only was crystallization ti...Zeoilte T crystals were synthesized by microwave heating and could be crystallized well within 8 h when the template was added in the gel. Compared with the conventional heating method, not only was crystallization time reduced over 80%, but also the crystallinity and surface area of crystals were improved. Similar phenomenon occurred in the presence of seeds. In addition to shorter synthesis time, the smaller crystals with narrower particle size distribution were obtained by the title method. These could be attributed to high heating rate, fast dissolution of gel and homogeneous heating of microwave irradiation.展开更多
由摩尔组成为SiO_2:Al_2O_3:Na_2O:K_2O:H_2O=1:0.015:0.25:0.08:25的澄清溶液,在预涂晶种的管状莫来石支撑体上水热合成T型沸石分子筛膜。在高于100℃清液体系中合成出了高性能T型沸石分子筛膜。用X射线衍射(X-raydiffraction,XRD)仪...由摩尔组成为SiO_2:Al_2O_3:Na_2O:K_2O:H_2O=1:0.015:0.25:0.08:25的澄清溶液,在预涂晶种的管状莫来石支撑体上水热合成T型沸石分子筛膜。在高于100℃清液体系中合成出了高性能T型沸石分子筛膜。用X射线衍射(X-raydiffraction,XRD)仪和扫描电子显微镜(scanning electron microscope,SEM)对150℃下合成35h的分子筛膜进行了表征。XRD谱表明:T型沸石分子筛成功地生长在预涂晶种的支撑体上。支撑体的外表面覆盖着20μm厚有取向的晶体层。从SEM照片判断,起到分离作用的是生长致密的中间层,而不是表层。在150℃下制备的膜,对水/乙醇、水/异丙醇混合物具有高渗透汽化分离性能。优异的渗透汽化性能归因于在涂有晶种的多孔支撑体上生长了一层高结晶度且缺陷较少的T型沸石分子筛晶体层。展开更多
基金supported by the National Natural Science Foundation of China(20966003,21106059)the National High Technology Research and Development Program of China(863 Program,2012AA03A609)+1 种基金Jiangxi Provincial Department of Science and Technology(2010BGA01200,2010GQH0068,20122BAB203018)Jiangxi Provincial Department of Education(GJJ11377)~~
文摘Zeoilte T crystals were synthesized by microwave heating and could be crystallized well within 8 h when the template was added in the gel. Compared with the conventional heating method, not only was crystallization time reduced over 80%, but also the crystallinity and surface area of crystals were improved. Similar phenomenon occurred in the presence of seeds. In addition to shorter synthesis time, the smaller crystals with narrower particle size distribution were obtained by the title method. These could be attributed to high heating rate, fast dissolution of gel and homogeneous heating of microwave irradiation.
文摘由摩尔组成为SiO_2:Al_2O_3:Na_2O:K_2O:H_2O=1:0.015:0.25:0.08:25的澄清溶液,在预涂晶种的管状莫来石支撑体上水热合成T型沸石分子筛膜。在高于100℃清液体系中合成出了高性能T型沸石分子筛膜。用X射线衍射(X-raydiffraction,XRD)仪和扫描电子显微镜(scanning electron microscope,SEM)对150℃下合成35h的分子筛膜进行了表征。XRD谱表明:T型沸石分子筛成功地生长在预涂晶种的支撑体上。支撑体的外表面覆盖着20μm厚有取向的晶体层。从SEM照片判断,起到分离作用的是生长致密的中间层,而不是表层。在150℃下制备的膜,对水/乙醇、水/异丙醇混合物具有高渗透汽化分离性能。优异的渗透汽化性能归因于在涂有晶种的多孔支撑体上生长了一层高结晶度且缺陷较少的T型沸石分子筛晶体层。
