The kinetics of CO₂ absorption into aqueous solutions of N,N-diethylethanolamine (DEEA), and N,N-dimethylethanolamine (DMEA), and their blends with monoethanolamine (MEA) have been studied in a stopped-flow apparatus. The kinetics experiments were carried out at the concentrations of DEEA and DMEA varying from 0.075 to 0.175 kmol/m³, respectively, and that of MEA ranging between 0.0075 and 0.0175 kmol/m³, over the temperature range of 293–313 K. Two kinetics models are proposed to interpret the reaction in the blended amine systems and the results show that the model which incorporates the base-catalyzed hydration mechanism and termolecular mechanism resulted in a better prediction. Furthermore, the kinetics behaviors of CO₂ absorption into two blended systems are comprehensively discussed according to their molecular structures. It can be concluded that the interaction between tertiary amines and primary amines as well as the alkyl chain length of tertiary amines have a significant influence on the kinetics. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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DEEA / MEA和DMEA / MEA混合溶液吸收CO2的比较动力学研究

N，N-二乙基乙醇胺（DEEA）和N，N-二甲基乙醇胺（DMEA）以及它们与单乙醇胺（MEA）的共混物在水溶液中吸收CO ₂的动力学已经在停流装置中进行了研究。动力学实验在DEEA和DMEA的改变从0.075到0.175千摩尔/米浓度进行³，分别与该MEA测距0.0075之间和0.0175千摩尔/米³，在温度范围293-313 K.两个的提出了动力学模型来解释共混胺体系中的反应，结果表明该模型结合了碱催化的水合机理和分子机理，具有更好的预测效果。此外，CO ₂的动力学行为根据它们的分子结构，全面讨论了两个共混体系中的吸收。可以得出结论，叔胺和伯胺之间的相互作用以及叔胺的烷基链长对动力学有重要影响。©2017美国化学工程师学会AIChE J，2017