Invention Reference Number
ORNL contributes to developing the concept of passive CO2 DAC by designing and testing a hybrid sorption system. This design aims to leverage the advantages of CO2 solubility and selectivity offered by materials with selective sorption of adsorbents. This hybrid system was used in the direct air capture of CO2 by the aqueous phase as probed by various techniques. The improved CO2 capture observed is attributed to the high solubility for CO2, thus serving as a concentration stage that ultimately enhances the transport to the aqueous phase via chemical gradients. Additionally, the introduction of a phase can reduce interfacial barriers and influence the distribution at the polymer-aqueous interface. These three effects lead to the enhancement in CO2 capture by the aqueous phase. The current study provides important model design , which could have significant implications for developing DAC as a negative emissions technology.
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
