The Kinetic Effect of Adding Piperazine Activator to Aqueous Tertiary and Sterically-hindered Amines Using Stopped-flow Technique

摘要: Abstract Aqueous amines as the solvents for CO 2 removal in low concentration streams have been exhaustively studied. This work focuses on blending of piperazine (PZ) activator with aqueous tertiary (Methyldiethanolamine, MDEA) across range 200-900 mol/m3 MDEA and 5-41 mol/m3 PZ sterically-hindered (2-amino-methyl-1-propanol, AMP) 6-24 mol/m3 AMP 7-48 mol/m3 at temperature 298-313 K using stopped-flow technique to determine direct pseudo first-order reaction kinetics blends. The different proposed mechanisms such base-catalyzed hydration, zwitterion termolecular solutions were used calculate second-order rate constants k , (m3·mol-1s-1). Zwitterion mechanism correlated stand-alone perfectly while base catalysis successfully. Hybrid blend AMP/PZ a hybrid experimental data MDEA/PZ system.