Nano composite PEBAX® membranes: Effect of zeolite X filler on CO2 permeation

Document Type: Reasearch Paper


1 Separation processes research group (SPRG), Department of Engineering, University of Kashan, Kashan, Iran.

2 Polymer Science & Technology Division, Research Institute of Petroleum Industry, Tehran, Iran.

3 Energy Research Institute, University of Kashan, Ghotb-e-Ravandi Ave., Kashan, Iran.



A PEBAX-nano zeolite X mixed matrix membrane was fabricated and operationally characterized using single gas (CO2) permeation. X-ray diffraction (XRD) analysis was used to study the arrangement of polymer chains of mixed matrix membrane. The membranes were characterized by scanning electron microscopy (SEM) to study cross-sectional morphology. The single gas permeability were carried out for neat PEBAX and PEBAX-nano zeolite X (10 wt. %) membranes. Operating pressures varied from 6 to 14 bars. CO2 permeability for the nano-composite membrane was higher than the neat polymer membrane and increased with pressure. Adding 10 wt.% of nanozeolite X into the polymeric matrix caused CO2 permeability to increase. Both structurally and operationally characterizations revealed the defect-free structure of the nano composite membrane.