Solvent Extraction of Degradation Products in Amine Absorption Solution for CO2 Capture in Flue Gases from Coal Combustion: Effect of Amines

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Abstract

Formate degradation product was extracted in monoethanolamine (MEA), N-methyldiethanolamine (MDEA), 2-amino-2-methylpropan-1-ol (AMP) and their blend by OH-aliquat336 in 2-ethyl-1-hexanol. The results showed that the extracted formate decreased with an increase of amine concentration due to the increase of interaction of the amine with formate. The blended amine (3 M MEA+1 M MDEA+1 M AMP) had higher extraction efficiency than single 5 M MEA. Extraction efficiency was increased with an increase of temperature. In the presence of CO2 loading, the extraction efficiency of formate decreased due to competitive reactions between carbamate (R1R2NCOO-), bicarbonate (HCO3-) and carbonate (CO32-) with the extractant. Published by Elsevier Ltd.

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Karnwiboon, K., Saiwan, C., Idem, R., Supap, T., & Tontiwachwuthikul, P. (2017). Solvent Extraction of Degradation Products in Amine Absorption Solution for CO2 Capture in Flue Gases from Coal Combustion: Effect of Amines. In Energy Procedia (Vol. 114, pp. 1980–1985). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2017.03.1331

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