Gas permeation models in mixed matrix membranes for gas separation

• Main Authors: Rafiq, S., Maulud, A.S., Man, Z.B., Muhammad, N.
• Format: Article
• Published: Trans Tech Publications Ltd 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904061108&doi=10.4028%2fwww.scientific.net%2fAMR.917.317&partnerID=40&md5=f4e2bcc8afe7febe8eaaceb2e010b4f8; http://eprints.utp.edu.my/32350/
• Institution: Universiti Teknologi Petronas

Various theoretical models on CO2 permeation were discussed that included Maxwell model, Bruggeman model, Lewis-Nielson model and Pal model. These models were used for comparing the relative permeance of CO2 with the previously published experimental data on silica nanoparticles filled polysulfone/polyimide (PSF/PI) mixed matrix membranes (MMMs). The results showed that the deviation was in the increasing order: Lewis-Nielsen model< Maxwell model< Pal model< Bruggeman model. All these models assumed that the fillers are spherical in shape. A scanning electron microscope (SEM) cross-sectional image indicated that the silica particles were prolate ellipsoids that were dispersed in the matrix. To investigate the prolate effect, the Maxwell- Wagner-Sillar (MWS) model was employed. The evaluation from cross-sectional image of the membrane structure indicated that the shape factor along z-direction gave a minimum deviation of 17.52-20.10 at 2-10 bar feed pressure respectively. © (2014) Trans Tech Publications, Switzerland.