A novel reactive 4-diethylamino-2-butanol solvent for capturing CO2 in the aspect of absorption capacity, cyclic capacity, mass transfer, and reaction kinetics

In the present work, the performance of a novel reactive solvent, 4-diethylamino-2-butanol (DEAB), was comprehensively investigated and compared with the conventional solvents (e.g., MEA and MDEA) in terms of CO2 absorption capacity, cyclic capacity, mass transfer performance, and absorption kinetics. The results showed that DEAB can be considered as alternative promising solvent for capturing CO2 because its outstanding performance on much higher absorption capacity, higher cyclic capacity, and higher mass transfer performance; comparing with those of MEA and MDEA. In addition, the CO2 absorption kinetics of DEAB was found to be faster than that of conventional tertiary MDEA, but slower than that of conventional primary MEA.