Gas permeation through zeolite‐alumina composite membranes
Gas permeation through zeolite‐alumina composite membranes
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DOI：
10.1002/aic.690431318
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发表时间：
1997
期刊：
影响因子：
3.7
通讯作者：
N. Nishiyama;K. Ueyama;M. Matsukata
中科院分区：
文献类型：
--
作者：
N. Nishiyama;K. Ueyama;M. Matsukata
采用气相传输法制备了无针孔、无裂纹的丝光沸石(MOR)和铁氧体(FER)膜。测定了H2、He、CH4、N2、O2和CO2在290~400K温度范围内的渗透系数，多数情况下，随着温度的升高，渗透系数最小。在提出的平行扩散模型中，假设吸附在微孔中的分子平行地通过孔的中心区和沿孔的壁区扩散。该平行扩散模型考虑了MOR和FER的孔径对渗透的影响，与实验数据吻合较好。对于每种气体，评估了气体分子与孔壁之间的相互作用。
Mordenite (MOR) and ferrierite (FER) membranes without any pinhole and crack were synthesized by a vapor-phase transport method. The permeance of H 2 , He, CH 4 , N 2 , O 2 and CO 2 was determined at 290-400 K, which showed minimum with increasing temperatures for most cases. In the parallel diffusion model was proposed, molecules adsorbed in a micropore are assumed to diffuse in parallel through the central region of the pore and along the wall region of the pore. This parallel diffusion model accounts for the effect of pore size of MOR and FER on the permeation and expresses the experimental data well. The interaction between gas molecules and pore walls are evaluated for each gas.