关键词: 醇胺, 模拟, CO2脱除率, 再沸器热负荷

Abstract: The absorption of CO2 in the flue gas by alkanolamine solution was simulated using the Aspen Plus software. The amount of absorbent，load of lean liquid and reboiler heat duty were used to evaluate the decarbonization process，and the absorptions and desorptions of different alkanolamines were compared. The results showed that the CO2 removal rate increased with the absorbent amount and absorber progression，and lower flue gas CO2 concentration can improve the removal rate. The increase in lean liquid load reduced the absorbent absorption capacity. The minimum regeneration heat consumption was under the condition of αlean=0.08 at the same CO2 removal rate. The reboiler total duty increased with the increasing of the CO2 recovery，but the specific heat consumption first dropped and then increased slightly. The specific heat consumption obtains a minimum value around the CO2 recovery of 80%. The absorption capacities of various alkanolamine solutions were PZ > MEA > DEA≈AMP > MDEA，degeneration capacities were PZ > AMP > MEA. These solutions should be mixed to achieve the best results in absorption and desorption.

Key words: alkanolamine, simulation, CO2 removal rate, reboiler heat duty