The MEA-DEA blended amine solvents have been a hot research topic recently. This study focused on the absorption efficiency tests of 5 mol/L MEA-DEA blended solvents in a batch and semi-batch process, with the aid of solid chemicals CaCO3 and MgCO3 . 5.0 mol/L MEA solvent was used as benchmark. The absorption profiles and initial absorption rates were plotted to select the optimized mix ratio. The results indicated that 2 +3M MEA-DEA had good performance in absorption with the aid of CaCO3 . After comprehensive consideration, the 2+ 3M MEA-DEA with solid alkaline chemical (CaCO3 ) in the absorber and blended catalysts (gamma-Al2O3 /H-ZSM-5 = 2:1) in the desorber was selected as the energy efficient solution (among 1 +4, 2 + 3, 3 + 2, and 4 +1M MEA-DEA) for the pilot plant. It contained 72-75% of the absorption efficiency but only 46.5-50% of the heat duty compared with 5M non-catalytic MEA.