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• W2970293253 abstract "Biphasic solvents containing mixed amines have a phase separation behavior and energy-efficient regeneration for CO2 capture. However, the trade-off between the CO2 absorption capacity and the volume ratio of the CO2-rich phase presents a critical challenge to the reducing potential in regeneration energy consumption. In this study, sulfolane was proposed to regulate the phase separation behavior of a N,N-diethylethanolamine (DEEA)-triethylenetetramine (TETA) biphasic absorbent by simultaneously decreasing the volume ratio and increasing the CO2 loading of the rich phase, without sacrificing the high CO2 capacity. In the DEEA-TETA-sulfolane biphasic absorbent, sulfolane acted as a phase splitter and physical activator. The replacement of a part of H2O by hydrophobic sulfolane contributed to a substantial decrease in the volume ratio of the rich phase from 83 to 39% and an increase in CO2 loading of the rich phase from 3.10 to 4.92 mol/L. The regeneration heat decreased to 1.81 GJ/t CO2, 26.4% less than DEEA-TETA, and 54.6% less than the 5 M monoethanolamine system. Moreover, by promoting the mass transfer coefficient of CO2 in DEEA-TETA-sulfolane to 1.8 times the original DEEA-TETA system, sulfolane was validated as a physical activator. Our study provides a promising strategy for regulating the phase separation behavior of biphasic solvents and enhancing the regeneration energy efficiency for CO2 capture." @default.
• W2970293253 created "2019-09-05" @default.
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• W2970293253 date "2019-08-26" @default.
• W2970293253 modified "2023-10-17" @default.
• W2970293253 title "Regulating Phase Separation Behavior of a DEEA–TETA Biphasic Solvent Using Sulfolane for Energy-Saving CO₂ Capture" @default.
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• W2970293253 doi "https://doi.org/10.1021/acs.est.9b02787" @default.
• W2970293253 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31446756" @default.
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