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Sorbents for the Direct Capture of CO2 from Ambient Air
Xiaoyang Shi1,2, Hang Xiao2, Habib Azarabadi1
1School of Sustainable Engineering & Built Environment, Arizona State University, Tempe, AZ, 85287, USA.
Abstract:
The urgency to address global climate change induced by greenhouse gas emissions is increasing. In particular, the rise in atmospheric CO2 levels is generating alarm. Technologies to remove CO2 from ambient air, or "direct air capture" (DAC), have recently demonstrated that they can contribute to "negative carbon emission." Recent advances in surface chemistry and material synthesis have resulted in new generations of CO2 sorbents, which may drive the future of DAC and its large-scale deployment. This Review describes major types of sorbents designed to capture CO2 from ambient air and they are categorized by the sorption mechanism: physisorption, chemisorption, and moisture-swing sorption.
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