Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China.
Department of Environmental Science & Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian 361021, China.
J Environ Sci (China). 2025 Apr;150:622-631. doi: 10.1016/j.jes.2023.06.017. Epub 2023 Jun 21.
The non-aqueous solid-liquid biphasic solvent of 2-amino-2-methyl-1-propanol (AMP)/piperazine (PZ)/dipropylene glycol dimethyl ether (DME) features a high CO absorption loading, favorable phase separation behavior and high regeneration efficiency. Different with the liquid-liquid phase change solvent, the reaction kinetics of CO capture into solid-liquid biphasic solvent was rarely studied. In the present work, the reaction kinetics of CO absorption into AMP/PZ/DME solid-liquid biphasic solvent was investigated into the double stirred kettle reactor. The absorption reaction followed a pseudo-first-order kinetic model according to the zwitterion mechanism. The overall reaction rate constant (k) and the enhancement factor (E) of CO absorption both increased with increasing temperature. The total mass transfer resistance of the absorbent decreased with increasing temperature and increased with increasing absorption loading, so the higher reaction temperature was conducive to the absorption, and the liquid phase mass transfer resistance was the main factor affecting the absorption rate.
2-氨基-2-甲基-1-丙醇（AMP）/哌嗪（PZ）/二丙二醇二甲醚（DME）的非水固-液双相溶剂具有高的 CO 吸收负载量、良好的相分离行为和高的再生效率。与液-液相变溶剂不同，CO 进入固-液双相溶剂的反应动力学很少被研究。在本工作中，在双搅拌釜反应器中研究了 CO 进入 AMP/PZ/DME 固-液双相溶剂的吸收反应动力学。根据两性离子机理，吸收反应遵循准一级动力学模型。CO 吸收的总反应速率常数（k）和增强因子（E）均随温度升高而增加。吸收剂的总传质阻力随温度升高而降低，随吸收负载量增加而增加，因此较高的反应温度有利于吸收，而液相传质阻力是影响吸收速率的主要因素。
