Active Sites Decorated Nonpolar Pore‐Based MOF for One‐step Acquisition of C2H4 and Recovery of C3H6

Herein, a 2-fold interpenetrated metal-organic framework (MOF) Zn-BPZ-TATB with accessible N/O active sites in nonpolar pore surfaces was reported for one-step C₂ H₄ purification from C₂ H₆ or C₃ H₆ mixtures as well as recovery of C₃ H₆ from C₂ H₆ /C₃ H₆ /C₂ H₄ mixtures. The MOF exhibits the favorable C₂ H₆ and C₃ H₆ uptakes (>100 cm³ g^-1 at 298 K under 100 kPa) as well as selective adsorption of C₂ H₆ and C₃ H₆ over C₂ H₄ . The C₃ H₆ - and C₂ H₆ -selective feature were investigated detailedly by experimental tests as well as sorption kinetic studyies. Molecular modelling revealed the multiple interactions between C₃ H₆ or C₂ H₆ molecules and methyl groups as well as triazine rings in pores. Zn-BPZ-TATB not only can directly generate 323.4 L kg^-1 and 15.4 L kg^-1 of high-purity (≥99.9 %) C₂ H₄ from C₃ H₆ /C₂ H₄ and C₂ H₆ /C₂ H₄ mixtures, but also provide a large high-purity (≥99.5 %) C₃ H₆ recovery capacity of 60.1 L kg^-1 from C₃ H₆ /C₂ H₄ mixtures. More importantly, the high-purity C₃ H₆ (≥99.5 %) and C₂ H₄ (≥99.9 %) with the productivities of 38.2 and 12.7 L kg^-1 can be simultaneously obtained from C₂ H₆ /C₃ H₆ /C₂ H₄ mixtures through a single adsorption/desorption cycle.