Rafiq, S. and Maulud, A. and Man, Z. and Mutalib, M.I.A. and Ahmad, F. and Khan, A.U. and Khan, A.L. and Ghauri, M. and Muhammad, N. (2015) Modelling in mixed matrix membranes for gas separation. Canadian Journal of Chemical Engineering, 93 (1). pp. 88-95.
Full text not available from this repository.Abstract
Various gas permeation models including Maxwell model, Bruggeman model, Lewis-Nielson model and Pal model were compared via a modelling approach with the relative permeance of CO2 against published experimental data on silica filled polysulfone/polyimide (PSF/PI) mixed matrix membranes (MMMs). However, none of the tested models were able to predict the data with good accurately. A closer look at the cross-sectional image by scanning electron microscopy (SEM) indicated that the fillers were actually prolate ellipsoids dispersed within the matrix. Maxwell-Wagner-Sillar model was then employed to investigate the prolate effect and it was observed that the optimization curves of maximum packing (�m) and shape factor (n) showed least deviations. The percentage average absolute relative error (AARE ) value for fitted shape factor (nf) was found to be in the range of 1.12-2.17 at 2-10 bar pressure which showed its robustness. A further evaluation from SEM image showed that the shape factor along z-direction (nz) displayed a minimum deviation of 17.52 for prolates at 0.102±0.01. By using nz as upper limit and estimated shape factor ne through generalization, the error was reduced to 6.01. The AAR deviation was found in the order of nf <ne<nz,which indicated the importance of shape factor parameter for estimating true CO2 permeance. © 2014 Canadian Society for Chemical Engineering.
Item Type: | Article |
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Impact Factor: | cited By 15 |
Uncontrolled Keywords: | Carbon dioxide; Curve fitting; Matrix algebra; Polyimides; Polysulfones; Scanning electron microscopy; Silica, Bruggeman model; Cross sectional image; Gas separations; Maximum packing; Mixed matrix membranes; Particle geometries; Relative errors; Silica nanoparticles, Gas permeable membranes |
Depositing User: | PROF TS DR MOHAMED IBRAHIM ABDUL MUTALIB |
Date Deposited: | 25 Mar 2022 07:18 |
Last Modified: | 04 Jan 2023 02:06 |
URI: | http://scholars.utp.edu.my/id/eprint/30784 |