47. Comprehensive Analyses on Activation Agents of Amines and Nanoparticles for TETA-Based CO₂ Capture Absorbents

The issue of climate warming and emissions to the core of global public focus. Chemical absorption is the most possible CCS technology for large-scale commercial application, in which the absorbents were the most critical factor to determine the CO₂ capture performance. In this study, TETA-based high-performance absorbents by adding activation agents of nanoparticles and other amines. In this study, TETA-based high-performance absorbents were prepared by adding activation agents with nanoparticles and amines. The ab/desorption performance was tested by a bubble reactor. The critical parameters, such as ab/desorption rate, equilibrium time and CO₂-loading, were comprehensively summarized and learned by AHP method. The results proves that Ab/desorption CO₂-loading occupies the most important part with the value of 30.77 and 24.36%, respectively. The sequences of amine activation agents is 2.5%PZ > 2.5%DEA > 2.5%MDEA > 2.5%AMP > 2.5%TEA and 5.0%PZ > 5.0%AMP > 5.0%DEA > 5.0%MDEA > 5.0%TEA. For amine activation agents, the addition of PZ shows the optimal overall CO₂ capture performance with the value of 0.593 and 0.580. The activation agent of DEA also shows impressive overall CO₂ capture performance. The cheap price of 8 k RMB/t gives it the potential for developing high-performance absorbents with the increase of mass fraction, the overall scores of AL₂O₃-TETA nanofluids increase first and then decrease. The Brown motion of nanoparticles can effectively promote the heat/mass transfer performance of the absorbents.