空気中の炭素を回収するのが簡単になった(Capturing carbon from the air just got easier)

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2024-10-23 カリフォルニア大学バークレー校(UCB)

カリフォルニア大学バークレー校の研究チームが開発した新しい多孔質材料「共有結合有機構造体(COF)」が、空気中から効率的に二酸化炭素(CO2)を捕捉できることを発見しました。この材料は従来の技術と比べて水や汚染物質に耐性があり、再生が容易で、低温でCO2を放出して再利用可能です。COFは従来の技術よりも優れた性能を持ち、将来的にはCO2排出削減や気候変動対策に貢献すると期待されています。

<関連情報>

共有結合有機フレームワークを用いた大気中からの二酸化炭素の回収 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 & Omar M. Yaghi
Nature  Published:23 October 2024
DOI:https://doi.org/10.1038/s41586-024-08080-x

空気中の炭素を回収するのが簡単になった(Capturing carbon from the air just got easier)

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).

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