Accounting for the effect of pressure on the permeability of gases through polymer membranes

A. A. Askadsky, A. V. Matseevich
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Abstract

The calculation scheme is proposed for analyzing the effect of pressure on the permeability of various gases through polymeric membranes. The calculation scheme is based on the proposed equation, in which the activation energy of the permeability process decreases under the action of pressure according to a power law. The adequacy of the calculation scheme was verified on the example of CO2 permeability through polyimide-based membranes. A good agreement was found between the calculated and experimental data on the increase in permeability with increasing pressure. The performance of the scheme was also tested using the example of three polyimides for two cases-growth and non-monotonic change in permeability. The decrease in permeability and the absence of dependence on pressure are analyzed.
说明压力对气体通过聚合物膜的渗透性的影响
为分析压力对各种气体通过聚合物膜的渗透性的影响,提出了计算方案。该计算方案基于所提出的方程,在该方程中,渗透过程的活化能在压力作用下按照幂律递减。以二氧化碳通过聚酰亚胺膜的渗透性为例,验证了计算方案的适当性。在渗透率随压力增加而增加的问题上,计算数据和实验数据非常吻合。此外,还以三种聚酰亚胺为例,测试了渗透率增长和非单调变化两种情况下该方案的性能。分析了渗透率的下降和与压力无关的情况。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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