Permeability of gas mixtures in the glassy polymers with and without plasticization

Masoud Saberi

Abstract


In this research, solubility, permeability and diffusivity of gas mixtures are comprehensively studied through the glassy polymers. Diffusivity of components in the mixture is assumed to be a function of the concentration of all components in the mixture. Then, the permeability of pure species is expanded to the gas mixtures and for checking the validity, the model fitted to the experimental data for permeation of CO2/CH4 through different glassy mem­branes and the parameters of the model are calculated. Afterwards, the obtained parameters are used for predicting permeability of CO2 and CH4 in the mixture. The results show that solubility, diffusivity, and also permeability of CO2 in the glassy polymers are suppressed in the presence of CH4 as well as plasticization. Moreover, the diffusivity (D) for pure CO2 is significantly pressure dependent in the presence of plasticization whereas with the increase in the CH4 fraction, this dependency decreases due to the reduction in the plasticization.


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DOI: https://doi.org/10.2298/JSC200715046S

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