Amino-acid-salt-based carbon dioxide capture: precipitation behavior of potassium sarcosine solution

This work studied the precipitation behavior of solids in the aqueous solution of potassium sarcosine (KSar) during the CO₂ capture process with the concentration of 5m' (mol/kg solution). The effect of precipitation on the CO₂ capture capabilities was also studied. The results showed that 5m' KSar gives a comparable result to MEA. The relatively high initial CO₂ absorption efficiency combined with the positive effect of precipitation on CO₂ absorption rate and CO₂ capacity have made the 5m' KSar be a promising solvent for the CO₂ capturing process with precipitation.