(612g) Rapid CO2 Capture from Ambient Air By Electrospun Particle/Fiber Composite Adsorbents

Direct air capture (DAC), the process of removing carbon dioxide directly from ambient air, has the potential to become a powerful tool for combating climate change. To use these sorbents for direct air capture, they must be embedded in a macroscopic scaffold that effectively exposes them to the air. Ideally, the scaffold should disperse the sorbent well, provide minimal impedance to the kinetic uptake, and not severely restrict the natural movement of the bulk air. In this talk, we would like to present our recent progress in the study of using electrospun particle/fiber composite adsorbents to provide a rapid CO2 capture performance in moisture swing adsorption. Electrospun fibers can provide fiber diameters as low as 20 nm, allowing for fibers to be readily designed to be smaller than most sorbents. Also, fiber matrices may provide enhanced heat removal, and high inter-fiber porosity allows easy fluid transport through the scaffold. The ion-exchange resin embedded in porous electrospun fibers fabricated and characterized in our recent work shows the highest carbon dioxide uptake per gram-hour found in literature as far as we are aware.