Abstract Piperazine (PZ) was used to enhance the absorption of CO2 in 2-diethylaminoethanol (DEAE) and 1-dimethylamino-2-propanol (DMA2P) aqueous solutions. The mole fraction of CO2 in N2-balanced gas mixtures ranged from 0.1 to 0.8. The mass fractions of amine and PZ ranged from 0.300 to 0.500 and from 0.050 to 0.075, respectively. The experiments were performed at 313.2 K. The absorption capacity and absorption rate under a series of conditions were illustrated, and the effect of CO2 partial pressure on the absorption performance was demonstrated. At a given CO2 partial pressure, the CO2 absorbed by the PZ promoted DEAE and DMA2P aqueous solutions increases with the mass fraction of the mixed aqueous solutions, and it increases with the CO2 partial pressure at a given mass fraction. The absorption capacity of the DMA2P-PZ aqueous solution is slightly higher than that of the DEAE-PZ aqueous solution. In addition, the absorption rate depends on the competitive effects of the mass fractions, solution viscosity and the partial pressure of CO2.

中文翻译：

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分压对哌嗪促进2-二乙氨基乙醇和1-二甲氨基-2-丙醇水溶液CO2吸收性能的影响

摘要 哌嗪 (PZ) 用于增强 CO2 在 2-二乙氨基乙醇 (DEAE) 和 1-二甲氨基-2-丙醇 (DMA2P) 水溶液中的吸收。在 N2 平衡的气体混合物中 CO2 的摩尔分数范围为 0.1 到 0.8。胺和 PZ 的质量分数分别为 0.300 至 0.500 和 0.050 至 0.075。实验在313.2 K下进行。说明了一系列条件下的吸收能力和吸收速率，并证明了CO2分压对吸收性能的影响。在给定的 CO2 分压下，PZ 促进的 DEAE 和 DMA2P 水溶液吸收的 CO2 随着混合水溶液的质量分数而增加，并且在给定的质量分数下随着 CO2 分压的增加而增加。DMA2P-PZ水溶液的吸收能力略高于DEAE-PZ水溶液。此外，吸收速率取决于质量分数、溶液粘度和 CO2 分压的竞争效应。