Study of CO2 separation with PES/Pebax compositemembrane

Separation of CO2 from CH4 is the main part of gas sweetening process for natural gas treatment. In the present study, Poly (amide-6-b-ethylene oxide) (Pebax MH 1657) copolymer was used as a selective layer to prepare a PES/Pebax composite membrane for CO2 capturing. Gas permeation and transport characteristics of single gases for CO2 and CH4 were investigated. Trans-membrane pressure and temperature were varied from 2.5 to 10 bar and 20-50 ºC respectively. An increase in temperature remarkably decreased the CO2/CH4 selectivity whereas thepermeability of both gases increased. Enhancement of CO2 permeability with increase in gas pressure can be ascribed to the membrane plasticization caused by relatively high solubility of CO2 in the membrane

کلیدواژه ها:

Pebax ، Composite membrane ، CO2 separation