Whole-Process Integration and Economic Analysis of Postcombustion CO₂ Capture with PZ-MDEA: From Experimental Validation to Industrial Application

In this study, postcombustion CO₂ capture processes using 30 wt % MEA and 20 wt % PZ+20 wt % MDEA as absorbents were established and investigated. Then, 30 wt % MEA and a mixed solution of 20 wt % PZ + 20 wt % MDEA were used as absorbents.

Three process configurations were simulated, including the standard configuration, the AIC-SSF configuration combining interstage cooling (AIC) and split rich solvent flow (SSF), and the AIC-SSF-MVR configuration integrated with mechanical vapor recompression (MVR). The results indicate that, under standard operating conditions, the 20 wt % PZ + 20 wt % MDEA mixed amine exhibits a reboiler heat duty of 2.73 GJ/t CO₂, which is 24.6% lower than that of the standard MEA baseline condition (3.62 GJ/t CO₂).