Developing advanced porous materials with industrial potential to separate multicomponent gas mixtures that are structurally similar is a crucial but challenging task. Here, we report the efficient one-step separation of ethylene (CH) from acetylene (CH) and carbon dioxide (CO) using an ultramicroporous metal-organic framework UTSA-16. The synergistic effect of the polarized carboxyl groups and coordinated water molecules in its pore channel enables the material to have high uptakes for CH and CO due to electrostatic potential matching, as well as excellent separation selectivity against CH. Breakthrough experiments suggest that UTSA-16 can efficiently separate 99.9% pure CH from ternary mixtures with a high productivity of 403 L kg. Moreover, the preparation cost of UTSA-16 is significantly lower than other related adsorbents by 40-2000 times, indicating its unique potential for industrial applications.

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http://dx.doi.org/10.1039/d3mh00697bDOI Listing

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