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Issue 22, 2021
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Application-specific thermodynamic favorability zones for direct air capture of carbon dioxide

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Abstract

An increased interest in the capture and conversion of carbon dioxide into valuable chemical products is fueled by impending societal and ecological consequences of increasing CO2 concentration in the atmosphere. This work utilizes Lackner's thermodynamic calculations for the capture of carbon dioxide from the atmosphere based on a single sorbent approximation to map thermodynamic favorability zones compatible with various applications. When a minimal amount of CO2 is removed from the air stream, −4.64 kcal mol−1 is estimated as the maximum free energy of binding for sorption to occur in atmospheric conditions at 1 atm pressure and room temperature. When complete scrubbing of CO2 from a dilute source is desired, a more negative free energy of sorption is needed, with an estimated −10.92 kcal mol−1 required for close to complete CO2 removal from the stream.

Graphical abstract: Application-specific thermodynamic favorability zones for direct air capture of carbon dioxide

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Article information


Submitted
17 Apr 2021
Accepted
10 May 2021
First published
19 May 2021

Phys. Chem. Chem. Phys., 2021,23, 12533-12536
Article type
Communication

Application-specific thermodynamic favorability zones for direct air capture of carbon dioxide

H. A. Petersen and O. R. Luca, Phys. Chem. Chem. Phys., 2021, 23, 12533
DOI: 10.1039/D1CP01670A

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