The stopped-flow technique was applied for the investigation of kinetics of CO₂ absorption into loaded MDEA solution over the range of MDEA concentration of 0.4 to 1.0 kmol/m³, CO₂ loading of 0.14 to 0.17 mol CO₂/mol amine and the temperature of 293 to 308 K. The kinetics of unloaded MDEA was also investigated for the comparison and a huge difference of results which should be equal theoretically was indicated between loaded and unloaded systems. Then, the effect of CO₂ loading on the kinetics was studied. As the loading increases, there is a turning point around loading of 0.10, below which the overall reaction constant decreases strongly. It was found that contribution of hydroxyl is a crucial to overall reaction rate constant and cannot be ignored and the influence of reverse reaction of MDEA and CO₂ can be ignored. The kinetics of loaded system obtained in this work was modified and interpreted well by the base-catalyzed mechanism with AARD of 6.29% and compares favorably with literature using gas-liquid apparatus. The kinetics of unloaded system in this work is approximately twice as that of literature and loaded system. This work provided literature review and interpretation of MDEA-CO₂-H₂O and is hopeful to shed light on kinetic study of CO₂ absorption in tertiary amine using stopped-flow apparatus.

停流技术用于研究MDEA浓度为0.4至1.0 kmol / m ³，CO ₂负载量为0.14至0.17 mol CO ₂ / mol胺和MDEA浓度为MDEA溶液时，CO ₂吸附到负载的MDEA溶液中的动力学。温度为293到308K。还对卸载MDEA的动力学进行了比较，结果表明，加载和卸载系统之间的结果差异很大，理论上应该相等。然后，CO ₂的作用研究了动力学负载。随着载荷的增加，在0.10的载荷附近有一个转折点，在此之下，总反应常数会大大降低。发现羟基的贡献对于总反应速率常数至关重要，并且不能忽略，并且MDEA和CO ₂的逆反应的影响可以忽略。在这项工作中获得的负载系统的动力学通过碱催化机理（AARD为6.29％）得到了很好的修改和解释，与使用气液装置的文献相比具有优势。在这项工作中，卸载系统的动力学大约是文献和加载系统的动力学的两倍。这项工作提供了对MDEA-CO ₂ -H _2的文献综述和解释。O和希望为使用停止流装置的叔胺吸收CO _2的动力学研究提供启发。