Permeation properties and microstructure of porous inorganic membranes.
Permeation properties and microstructure of porous inorganic membranes.
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多孔无机膜的渗透性能和微观结构。
DOI：
10.5360/membrane.26.124
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. Nakao
中科院分区：
文献类型：
--
作者：
Mikihiro Nomura;Takeo Yamaguchi;I. Kumakiri;S. Nakao
综述了无定形无机膜和沸石多孔膜的微观结构和渗透性能。比较了氢气的渗透性能，如活化能或对氮气或氦气的选择性。溶胶-凝胶法和化学气相沉积法制备的SiO_2膜的氢气活化能基本相同，均可制得相对疏松或致密的结构。考察了晶间通道对分子筛膜渗透性能的影响。晶间通道由碳氢化合物结焦或反扩散CVD方法填充。晶间通道的渗透特性用I-I模型进行了解释。根据该模型，乙醇是通过MFI分子筛膜的晶间通道从乙醇水溶液中选择的。
Microstructures of porous inorganic membranes and permeation properties through those membranes were reviewed for amorphous ilica membranes and zeolite membranes. Silica membranes were compared by the permeation properties of hydrogen such as activation energies or selectivities over nitrogen or helium. The activation energies of hydrogen through silica membranes prepared by the sol-gel method and the CVD method were the same level, and relatively loose or dense structure can be made by both methods. The effects of intercrystalline pathways on the permeation properties through zeolitic membranes were investigated. The intercrystalline pathways were filled by coking of a hydrocarbon or counterdiffusion CVD method. The permeation properties through intercrystalline pathways were explained by an i-i model. According to this model, ethanol was permselective from ethanol aqueous solution through intercrystalline pathways of the MFI zeolite membrane.