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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Mixed matrix membranes (MMMs) offer potential for gas separation.
  • Polysulfone (PSf) membranes suffer from CO2 plasticization.
  • Metal-organic frameworks (MOFs) can enhance membrane performance.

Purpose of the Study:

  • To fabricate and optimize polysulfone-based MMMs incorporating NH2-MIL-125(Ti) MOF for CO2/CH4 separation.
  • To evaluate the impact of NH2-MIL-125(Ti) on membrane morphology, gas permeability, selectivity, and plasticization resistance.
  • To compare the performance of MMMs with pristine PSf membranes.

Main Methods:

  • Solution casting method for MMM fabrication.
  • Gas permeation setup for performance evaluation (permeability and selectivity).
  • Morphological characterization of the membranes.

Main Results:

  • Incorporation of NH2-MIL-125(Ti) enhanced CO2/CH4 selectivity and maintained permeability.
  • The PSf/NH2-MIL-125(Ti)-15% membrane achieved 19.17 Barrer CO2 permeability and 31.95 CO2/CH4 selectivity.
  • MMMs exhibited significantly improved resistance to CO2 plasticization (up to 14 bar) compared to PSf membranes (4 bar).

Conclusions:

  • The developed PSf/NH2-MIL-125(Ti) MMMs are highly effective for CO2 separation.
  • These MMMs demonstrate superior performance metrics over traditional PSf membranes.
  • The findings highlight the potential of NH2-MIL-125(Ti) incorporation for advanced industrial gas separation applications.