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Keywords:

  • CO2 capture;
  • gas separation;
  • membranes;
  • metal–organic frameworks;
  • zeolites
Thumbnail image of graphical abstract

Well matched: Submicrometer-sized metal–organic framework (MOF) crystals (ZIF-90) were synthesized by a nonsolvent-induced crystallization technique and incorporated in mixed-matrix gas-separation membranes. ZIF-90/6FDA-DAM membranes (empty pink circle; beyond the upper bound for polymer membranes) show unprecedented high performance for CO2/CH4 separation by a MOF-based membrane. The key is the combination of the highly selective MOF and a highly permeable polymer.