2-(Diethylamino)ethanol (DEEA) and 3-(Methylamino) propylamine (MAPA) in combination may represent a promising absorbent system for CO2 capture due to high CO2 loading capacity, high equilibrium temperature sensitivity, low energy requirement for regeneration and relatively high reaction rate.Three different systems: DEEA–CO2–H2O; MAPA–CO2–H2O and DEEA–MAPA–CO2–H2O were studied quantitatively by NMR spectroscopy and the data are reported in the present work. The main products quantified for these systems are: carbonate-bicarbonate for the DEEA–CO2–H2O system; primary, secondary carbamate, dicarbamate for the MAPA–CO2–H2O system, and primary/secondary carbamate, dicarbamate, carbonate/bicarbonate in blended DEEA–MAPA–CO2–H2O. The speciation data of the three systems were measured and reported in the present work. The blended system of 5 M DEEA–2 M MAPA can form two liquid phases after being loaded with CO2 and both phases were analyzed quantitatively by NMR spectroscopy. The experimental data shows that the lower phase is rich in CO2 and MAPA while the upper phase was lean in CO2 and rich in DEEA. The ratio DEEA–MAPA in the lower phase increases with increasing partial pressure whereas for the upper phase the opposite is true.
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机译：2-（二乙氨基）乙醇（DEEA）和3-（甲氨基）丙胺（MAPA）的结合可能代表了一种有前途的吸收CO2的吸收剂系统，因为它具有较高的CO2负载能力，较高的平衡温度敏感性，较低的再生能源需求且相对较高三种不同的系统：DEEA–CO2–H2O;通过NMR光谱法对MAPA–CO2–H2O和DEEA–MAPA–CO2–H2O进行了定量研究，并在本工作中报告了数据。这些系统量化的主要产品是：DEEA–CO2–H2O系统的碳酸盐-碳酸氢盐； MAPA–CO2–H2O系统中的一级，二级氨基甲酸酯，二氨基甲酸酯，以及混合的DEEA–MAPA–CO2–H2O中的一级/二级氨基甲酸酯，二氨基甲酸酯，碳酸盐/碳酸氢盐。在目前的工作中，测量并报告了这三种系统的形态数据。 5 M DEEA–2 M MAPA的共混体系在负载有CO2后可以形成两个液相，并且通过NMR光谱对这两个相进行了定量分析。实验数据表明，下层相富含CO2和MAPA，而上层相富含CO2和DEEA。较低相中的DEEA-MAPA比随分压的增加而增加，而较高相中的相反。
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