Abstract

A model has been proposed for gas transfer through a composite polymer membrane taking into account the influence of adsorption kinetics on the surfaces of a selective layer. An analytical expression has been obtained that describes the gas transfer with regard to a finite adsorption rate and is consistent with the corresponding experimental data on gas permeability. It has been shown that the effect of the finite adsorption rate on the gas transfer increases with a decrease in the thickness of the selective polymer layer and should be taken into account along with diffusion, when describing and analyzing the transfer through composite membranes with active layers thinner than 1 μm. It has been found that, at comparable rates of adsorption and diffusion, the permeability of a composite membrane is governed by the thickness of the selective layer and the surface porosity of a support, thus being in consistent with experimental data on gas transfer through composite membranes.

中文翻译：

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吸附动力学对复合膜气体传输的影响

摘要

考虑到吸附动力学对选择性层表面的影响，已经提出了通过复合聚合物膜进行气体转移的模型。已经获得了一个分析表达式，该表达式描述了关于有限吸附速率的气体转移，并且与气体渗透率的相应实验数据一致。已经表明，有限吸附速率对气体转移的影响随着选择性聚合物层厚度的减小而增加，并且在描述和分析通过具有活性层的复合膜的转移时，应将其与扩散一起考虑在内。小于 1 μm。已经发现，在相当的吸附和扩散速率下，