Any proposed mechanism must explain these intricate observations." "What I appreciate about this work is the detailed and careful measurements of complex parameters. "DAC is a complex and multifaceted problem that requires an interdisciplinary approach," Farha said. Shindel added that wealthier countries should be attempting to get below zero emissions as developing countries, which rely more on the carbon economy, ramp down CO 2 production.Īnother senior author, chemistry professor Omar Farha, has experience exploring the role of metal-oxide framework (MOF) structures for diverse applications, including CO 2 capture and sequestration. Agriculture, concrete and steel manufacturers, for example, are major contributors to emissions but take up large footprints that make it impossible to capture carbon at a single source. It also doesn't work everywhere, Shindel said. "Traditional carbon capture holds onto CO 2 tightly, which means it takes significant energy to release it and reuse it," Hegarty said. Traditional carbon capture methods use sorbents to capture CO 2 at point-of-source locations, and then use heat or generated vacuums to release CO 2 from the sorbent. In recent years, moisture-swing capture has taken off. "Not only have we doubled the number of ions that exhibit the desired humidity-dependent carbon capture, we have also discovered the highest-performing systems yet," John Hegarty said.Ĭredit: Dravid lab / Northwestern University The group also expanded the number of ions used to make the reaction possible. "Even though there's some amount of energy required to humidify a volume of air, ideally you could get humidity 'for free,' energetically, by relying on an environment that has natural dry and wet reservoirs of air close together." "We liked moisture-swing carbon capture because it doesn't have a defined energy cost," Shindel said. Shindel said the idea behind the paper came from a desire to use ambient environmental conditions to facilitate the reaction. students John Hegarty and Benjamin Shindel were the paper's co-first authors. "This work advances our collective understanding of DAC, and our data and analyses provide a strong impetus to the community, for theorists and experimentalists alike, to further improve carbon capture under practical conditions."ĭravid is the Abraham Harris Professor of Materials Science and Engineering at Northwestern's McCormick School of Engineering and director of global initiatives at the International Institute for Nanotechnology. "We are not only expanding and optimizing the choice of ions for carbon capture, but also helping unravel the fundamental underpinnings of complex fluid-surface interactions," said Northwestern's Vinayak P. 3) in the journal Environmental Science & Technology. The approach incorporates innovative kinetic methodologies and a diversity of ions, enabling carbon removal from virtually anywhere. New research from Northwestern University shows a novel approach to capture carbon from ambient environmental conditions that looks at the relationship between water and carbon dioxide in systems to inform the "moisture-swing" technique, which captures CO 2 at low humidities and releases it at high humidities. Ambient carbon capture, or " direct air capture" (DAC) on the other hand, can take carbon out of typical environmental conditions and serves as one weapon in the battle against climate change, particularly as reliance on fossil fuels begins to decrease, and with it, the need for point-of-source carbon capture. It does not store any personal data.Typical carbon capture catches CO 2 directly from the source of a carbon-intensive process. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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