Propane/propylene separation is one of the most challenging and energy-consuming but most important tasks in the petrochemical industry. Herein, a stable hydrogen-bonded organic framework (HOF-FJU-1) was tailor-made for highly efficient propylene separation from binary C 3 H 6 /C 3 H 8 and even seven componentThe temperature-controllable diffusion channels in HOF-FJU-1 have enabled the porous material to completely exclude propane to reach high-performance propylene purification under energyefficient operation conditions. Single-crystal structural analysis revealed that the well-matched pore aperture of HOF-FJU-1 can exactly accommodate propylene molecules via multiple intermolecular interactions, exhibiting a very high propylene/propane selectivity of 616 at 333 K. The propylene purity and productivity are over 99.5% and 30.2 L kg −1 from the binary C 3 H 6 /C 3 H 8 (50/50) mixture at 333 K. Through a follow-up column separation of C 3 H 6 /C 2 H 4 at 353 K, not only high-purity propylene (99.5%) but also ethylene (98.3%) can be readily collected from the seven component CH 4

Since metal-organic frameworks, a versatile class of crystalline organic-inorganic hybrid materials featuring well-aligned intrinsic porosity, have come of age, the research focus has shifted from structural considerations toward the many...

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A pore engineering strategy involving the regulation of pillars in a series of pillarlayered metal-organic frameworks was presented to promote pore size adjustment and pore environment optimization for efficient separation of CH 4 from coal-mine methane. Compared with the original Ni(BTC)(BPY) and Ni(BTC)(TED), the suitable pore size and rich supply of carboxylate oxygens in the newly constructed Ni(BTC) (PIZ) resulted in the strongest recognition of CH 4 , leading to both high CH 4 uptake (1.62 mmol/g) and CH 4 /N 2 (50/50) selectivity (7.32) at 298 K and 1 bar. Its optimal balance performance between uptake and selectivity was better than most reported adsorbents, which further led to the most efficient separation of CH 4 from CH 4 /N 2 mixtures. The stability of the structure and performance was verified by repeated cycle tests. Overall, it is believed the structure constructed based on the regulation strategy of the interlayer channel would enable the application of promising metalorganic frameworks in industrial gas separation processes.

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