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13X zeolite shows potential for CO2 capture, but its performance is diminished by the steam present in real-world flue gas. To overcome this limitation, a facile and efficient approach is to graft straight-chain alkyl groups to the 13X structure. Adsorbents with anchored alkyl groups exhibit both high CO2 uptake and excellent resistance to humidity.

Graphical abstract: Alkyl-chain-grafted 13X zeolite for steady CO2 capture from humid flue gas

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