Abstract
AbstractPurification of ethylene (C2H4) is one of the most important industrial separation practices. In this report, Sc‐abtc, a rare‐earth microporous metal‐organic framework was successfully constructed from 3,3’,5,5’‐azobenzenetetracarboxylic acid (H4abtc) and scandium through facile solvothermal method. Sc‐abtc have shown preferrential adsorption of ethane over ethylene with 4.28 mmol g−1 uptake of ethane at ambient conditions. The calculated isosteric heat of adsorption revealed Sc‐abtc has stronger binding affinity toward C2H6 (28.2 kJ mol−1) than C2H4 (11 kJ mol−1), which revealled the mechanism of the ethane‐selective property. Moreover, column breakthrough tests were conducted to further verified the practical C2H4/C2H6 separation with excellent cycling stability.
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