Selective adsorption by porous materials for producing high-purity C 2H 4 has been determined to be one of the most desired methods for its low energy consumption 3, 4. Such a process is highly energy consuming, and thus exploring of other effective C 2H 4 separation methods at ambient conditions is highly demanded. The industrial separation of C 2H 4 from ethane (C 2H 6) is typically through cryogenic distillation at high pressure and very low temperature, using very high towers, because they have similar sizes and volatilities 2. Ethylene (C 2H 4), the largest feedstock in petrochemical industries with a global production capacity of more than 170 million tons in 2018, exceeds any other chemical feedstock molecules for its wide application in polyethylene manufacture 1.
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