Abstract
AbstractOne‐step C2H4purification from ternary C2H6/C2H4/C2H2mixtures by a single adsorbent is of great industrial significance, but few adsorbents achieve this separation. Herein, we report a robust metal–organic framework (MOF) that possesses methyl‐decorated nonpolar pores and shows one‐step C2H4purification (purity >99.9 %) from binary C2H6/C2H4mixtures and ternary C2H6/C2H4/C2H2mixtures. The methyl groups in pores provide a suitable pore environment to simultaneously enhance the adsorption capacity for C2H2and C2H6compared to C2H4. Simulations revealed the multiple interactions between C2H6or C2H2molecules and the pore wall, while the interactions with C2H4molecules are weak and also unfavorable due to the repulsion from methyl groups in pores. The MOF displays high C2H6and C2H2uptakes and benchmark C2H6/C2H4selectivity (2.2), surpassing all of the reported MOFs for one‐step C2H4purification from ternary C2H6/C2H4/C2H2mixtures.
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