Carbon dioxide capture from open air using covalent organic frameworks

Zihui Zhou, Tianqiong Ma, Heyang Zhang, Saumil Chheda, Haozhe Li, Kaiyu Wang, Sebastian Ehrling, Raynald Giovine, Chuanshuai Li, Ali H. Alawadhi, Marwan M. Abduljawad, Majed O. Alawad, Laura Gagliardi, Joachim Sauer () and Omar M. Yaghi ()
Additional contact information
Zihui Zhou: University of California
Tianqiong Ma: University of California
Heyang Zhang: University of California
Saumil Chheda: University of California
Haozhe Li: University of California
Kaiyu Wang: University of California
Sebastian Ehrling: 3P Instruments
Raynald Giovine: University of California
Chuanshuai Li: University of California
Ali H. Alawadhi: University of California
Marwan M. Abduljawad: King Abdulaziz City for Science and Technology
Majed O. Alawad: King Abdulaziz City for Science and Technology
Laura Gagliardi: University of Chicago
Joachim Sauer: Humboldt-Universität zu Berlin
Omar M. Yaghi: University of California

Nature, 2024, vol. 635, issue 8037, 96-101

Abstract: Abstract Capture of CO2 from the air offers a promising approach to addressing climate change and achieving carbon neutrality goals1,2. However, the development of a durable material with high capacity, fast kinetics and low regeneration temperature for CO2 capture, especially from the intricate and dynamic atmosphere, is still lacking. Here a porous, crystalline covalent organic framework (COF) with olefin linkages has been synthesized, structurally characterized and post-synthetically modified by the covalent attachment of amine initiators for producing polyamines within the pores. This COF (termed COF-999) can capture CO2 from open air. COF-999 has a capacity of 0.96 mmol g–1 under dry conditions and 2.05 mmol g–1 under 50% relative humidity, both from 400 ppm CO2. This COF was tested for more than 100 adsorption–desorption cycles in the open air of Berkeley, California, and found to fully retain its performance. COF-999 is an exceptional material for the capture of CO2 from open air as evidenced by its cycling stability, facile uptake of CO2 (reaches half capacity in 18.8 min) and low regeneration temperature (60 °C).

Date: 2024
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DOI: 10.1038/s41586-024-08080-x

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