Extended Data Fig. 1: The comparison of rinsed and unrinsed PCS-OH charged-sorbents.
From: Capturing carbon dioxide from air with charged-sorbents
(a) CO2 adsorption (filled data points) and desorption (hollow data points) isotherms of PCS-OH with the usual water rinsing/washing step, and also without a rinsing step, at 25 °C. (b) Low-pressure region of the CO2 adsorption isotherms from (a). Scanning electron microscopic images of activated carbon fabric ACC-5092-10 cloth: (c) (d) before charging, (e) (f) unrinsed PCS-OH and (g), (h) rinsed PCS-OH, with scale bars of (c) 500 µm, (e) (g) 50 µm and (d) (f) (h) 10 µm. The much lower CO2 uptake observed in (a) and (b) when the sample is not rinsed is attributed to the large amount of salt crystals on the carbon surface, which are inactive for CO2 capture.
