| Since1990s, the greenhouse effect caused by CO2emissions have attacted much attention from the world. The question of how to capture CO2in a fast and effective way becomes very important. Currently, chemical absorption technology has been considered to be a technolocial mature and cost-effective method for post-combustion CO2capture. However, one of the disadvantages of this method is that a large amount of reboiler heat duty is required to regenerate solvent, which accounts for70%of the overall operating cost.This paper focused on the experimental determination of Qreg of CO2desorption from CO2rich diethylenetriamine (DETA) solutions in a bench-scale stripper column (28.0mm internal diameter and0.50m packed height) packed with Dixon ring random packing. An evaluation of the stripper column was performance using MEA solution, the experimental results agreed with the data of literature, this shows that the device has certain reliability. Then the effects of three key operating parameters of DETA solution on the Qieg were comprehensively studied, including a solvent flow rate (L) range of2.92-11.69m3/m2-h, an amine concentration (C) range of1.0-4.0kmol/m3and a CO2cyclic capacity (a) range of0.21-0.79mol/mol. It was found that the Qieg was greatly influenced by all the three factors. In addition, a comparison of regeneration performances in terms of sensible heat, vaporization heat and reaction heat between DETA and MEA was performed to evaluate the potential for DETA’s application in the CO2capture process. The experiment results showed that the heat duty of DETA was lower than that of MEA at the same absorption capacity. In conclusion, DETA is a potential solvent for CO2capture. |
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