Jamil Asif, Ching Oh Pei, Iqbal Tanveer, Rafiq Sikander, Zia-Ul-Haq Muhammad, Shahid Muhammad Zubair, Mubashir Muhammad, Manickam Sivakumar, Show Pau Loke
Department of Chemical, Polymer and Composite Materials Engineering, University of Engineering and Technology Lahore (New-Campus), Pakistan.
CO2 Research Centre (CO2RES), Institute of Contaminant Management, Department of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, 32610 Perak, Malaysia.
J Hazard Mater. 2021 Sep 5;417:126000. doi: 10.1016/j.jhazmat.2021.126000. Epub 2021 May 5.
This study presents an extended thermodynamic and phenomenological combined model to mitigate the environmental hazardous acid gas over composite membranes. The model has been applied to an acid gas such as carbon dioxide (CO) for its permeation through polyetherimide incorporated montmorillonite (Mt) nanoparticles hollow fiber asymmetric composite membranes. The well-established non-equilibrium lattice fluid (NELF) model for penetrating low molecular weight penetrant in a glassy polyetherimide (PEI) was extended to incorporate the other important polymer/filler system features such as tortuosity in acid gas diffusion pathways resulted from layered filler aspect ratio and concentration. The model mentioned above predicts the behavior of acid gas in PEI-Mt composite membranes based on thermodynamic characteristics of CO and PEI and tortuosity due to Mt. The calculated results are compared to experimentally determined values of CO permeability through PEI-Mt composite asymmetric hollow fiber membranes at varying transmembrane pressures and Mt concentrations. A reasonable agreement was found between the model predicted behavior and experimentally determined data in terms of CO solubility, Mt concentration and aspect ratio were calculated based on average absolute relative error (%AARE). The proposed modified model efficiently predicts the CO permeance across MMMs up to 3 wt% Mt loadings and 6 bar pressure with ± 10%AARE.
