不同气体混合体系在聚二甲基硅氧烷膜中渗透过程的模拟与对比

分别对氮气-甲烷以及氮气-正戊烷两种混合气在聚二甲基硅氧烷（PDMS）膜中的渗透过程进行了实验，并且分别利用Maxwell-Stefans (MS)方程与UNIQUAC方程的组合模型和Fick定律与Henry定律的组合模型模拟了该渗透过程。实验数据与模拟数据的对比结果表明：对于不凝性气体混合物(如N₂、CH₄等)的渗透过程，两种模型均具有较好的模拟效果；对于含有可凝性气体(如C₅H₁₂)的混合物，则只有MS-UNIQUAC模型具有较好的模拟效果。

Comparison of experimental and predicted values for the permeation of different gas mixtures through a polydimethylsiloxane membrane

The permeation of N₂-CH₄and N₂-C₅H₁₂ gas mixtures through a polydimethylsiloxane (PDMS) membrane has been studied experimentally. In addition, Maxwel〖JP9〗l-Stefans-UNIQUAC (MS-U) and Fick-Henry (F-H) models were utilized to simulate gas/vapor permeation through the PDMS membrane and the predictions compared with the experimental results. The results indicate that, for a mixture of non condensable gases(N₂,CH₄), both models can predict the process exactly; but for a gas mixture containing a condensable gas (C₅H₁₂), only the MS-U model has an acceptable accuracy in predicting the permeation process.