Guide to evaluate low viscous non-aqueous solvent for post-combustion CO2 capture

Abstract

This work low viscous new amine based non-aqueous solvent (NAS) was developed for recovery of carbon dioxide (CO2) from post-combustion flue gases. The NAS system was made by mixing alkyl-functionalized single amine/polyamine as absorbent and alcohol/non-alcohol as solvent. The developed NAS does not form any precipitate/solid upon exposure to CO2 and showed low viscosity (cP < 20) homogeneous mixture (single phase) at the whole range of CO2 loading with the advantages of higher absorption and regeneration rates, higher cyclic capacities, and higher CO2 recoveries compared to bench mark MEA-based aqueous absorbents.