Thin Film Nanocomposite (TFN) Membrane Comprising Pebax®1657 and Porous Organic Polymers (POP) for Favored CO2 Separation

Document Type : VSI: Honoring Prof. Yampolskii


Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Shariati Ave, Babol, 47148 71167, Iran


Global warming is a public alarming issue caused by extreme CO2  emissions. Thus, CO2 removing using thin film  nanocomposite (TFN) membranes is an efficient procedure to enhance the CO2 gas separation efficiency. TFN  membranes composed of Pebax 1657 embedded by porous organic polymers over the porous polysulfone support used  to separate CO2 from CH4 and N2 gases. Porous organic polymers (POPs) were synthesized via Friedel-Crafts one-step  reaction. The obtained results from TGA and FESEM revealed that the modified TFN membranes declared a superior  compatibility between Pebax and fillers. Permeation properties of membrane samples were tested over various feed  pressure with the range of 2-10 bar. Pure gases permeability, CO2/N2 and CO2/CH4 selectivities improved via adding  porous organic polymers into the Pebax. At porous organic polymers loading of 5wt% and applied feed pressure of 2 bar,  the CO2, CH4 and N2 permeability enhanced to 310.6, 27.6 and 4.5 Barrer, respectively; which exhibited a significant  improvement compared to neat membrane. Moreover, the CO2/N2 and CO2/CH4 selectivities also enhanced to 11.25  and 70.04; respectively. Obtained results revealed that the membranes performance was enhanced as the feed gas  pressure increased. TFN containing 5wt% porous organic polymers imply a CO2 gas permeability of 348.4 Barrer at feed  pressure of 10 bar. 


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