The Study of Ion Speciation of CO2 Absorption into Aqueous 1-Dimethylamino-2-propanol Solution Using the NMR Technique

In this work, the tertiary amine, 1DMA2P, was employed to study the concentrations of 1DMA2P, 1DMA2PH+, HCO3-, CO32 when it is loaded with different CO2 loadings as determined using the 13C NMR technique at 1 M concentration of 1DMA2P, temperature of 301K, and CO2 loading in the range of 0-0.83 mol CO2/mol amine. The ion speciation (1DMA2P, 1DMA2PH+, HCO3-, CO32−) plots of 1DMA2P-H2O-CO2 system were developed in the study.