Nghiên cứu sử dụng màng tẩm chất lỏng ion cho quá trình tách khí CO2 ra khỏi hỗn hợp với khí metan

Abstract

Some supported ionic liquid membranes (SILMs) were prepared from polyvinylidene fluoride (PVDF), polyethersulfone (PES) membranes and ionic liquids butyl methyl imidazolium tetrafluoroborate ([BMIM][BF4]), butyl methyl imidazolium acetate ([BMIM][CH₃COO]). Prepared SILMs were used for CO₂ separation from the CO₂/CH₄ gas mixture. The results showed that the ideal selectivity 10.72÷14.43 and the real selectivity 9.77÷12.85 of SILMs for CO₂/CH₄ were observed (separation yields reached 90÷93 %) The mass and selectivity of SILMs were stable after working continuously for 30 days. These results exhibit the promising potential of using SILMs for CO₂ separation processes.