In 2022,Shohrat, Annanurov; Zhang, Mi; Hu, Hui; Yang, Xueying; Liu, Li; Huang, Hao published an article in International Journal of Greenhouse Gas Control. The title of the article was 《Mechanism study on CO2 capture by ionic liquids made from TFA blended with MEA and MDEA》.Quality Control of 3-Aminopropan-1-ol The author mentioned the following in the article:
Ionic liquids are presenting a great potential to increase the efficiency and reduce the cost of CO2 capture process. TFA was selected as anion in the produced ionic liquids to study its absorption capacity, and CO2 capture by [3-AP][TFA] and [MDEA][TFA] were tested under different conditions with various solvents such as water, MEA and MDEA. Results showed that ionic liquids blended with MEA improved the absorption capacity up to 0.50 mol CO2/mol absorbent, which was much higher than that of aqueous ionic liquid solution (less than 0.30 mol CO2/mol absorbent), and the aqueous solution of ionic liquids blended with MDEA could improve its absorption capacity up to 0.93 mol CO2/mol absorbent. Different ratios of ionic liquids blended with MDEA were investigated, and ratios of ionic liquids vs. MDEA was set from 2:1 to 1:6. The CO2 absorption capacity reached the maximum of 0.91 mol CO2/mol IL at ratio 1:6 for [3-AP][TFA] and 0.93 mol CO2/mol IL at ratio 1:4 for [MDEA][TFA], which indicated that the CO2 absorption capacity increased with ascending amount of MDEA. Characterizations of aqueous blends were performed by FT-IR and 13C NMR, which showed that the formation of bicarbonate was observed, indicating the mechanism of CO2 absorption was a two-step reaction via the formation of zwitterion. The produced zwitterions contributed to CO2 absorption by increasing both the capacity and reaction rate. Reaction of MDEA with CO2 in water was considered to be a catalyzed hydrolysis, because the lack of eliminating hydrogen atom prevented MDEA from forming carbamate but produced bicarbonate instead. In the experiment, the researchers used many compounds, for example, 3-Aminopropan-1-ol(cas: 156-87-6Quality Control of 3-Aminopropan-1-ol)
3-Aminopropan-1-ol(cas: 156-87-6) belongs to anime. Amines have a free lone pair with which they can coordinate to metal centers. Amine–metal bonds are weaker because amines are incapable of backbonding, but they are still important for sensing applications.While stronger than hydrogen bonds, amine–metal bonds are still weaker than both covalent and ionic bonds.Quality Control of 3-Aminopropan-1-ol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts