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采用酸碱中和一步法制备出四甲基铵甘氨酸([N1111][Gly])功能离子液体,并进行~1H NMR和TGA表征。通过[N_(1111)][Gly]与单乙醇胺(MEA)水溶液复配成混合吸收剂,研究了不同复配浓度、温度、压力对CO_2的吸收性能的影响。结果表明;在MEA溶液中添加[N_(1111)][Gly]功能离子液体可以提高吸收CO_2的速率,在本文采用的5种吸收剂中,0.3mol·L-[N_(1111)][Gly|与0.7 mol·L~(-1)MEA复配形成的吸收剂具有较高的吸收容量和较大的吸收速率。温度升高,混合吸收剂吸收CO_2的速率增加,但平衡时的吸收容量减小。混合吸收剂的CO_2吸收速率和吸收容量均随压力的升高而增加。
Tetramethylammonium glycine ([N1111] [Gly]) functional ionic liquid was prepared by one-step acid-base neutralization and characterized by ~ 1H NMR and TGA. The effect of different complex concentration, temperature and pressure on the absorption of CO_2 was studied by compounding [N_ (1111)] [Gly] and monoethanolamine (MEA) aqueous solution into mixed absorbent. The results showed that the addition of [N 1111] [Gly] functional ionic liquid to the MEA solution could increase the CO 2 uptake rate. Among the five absorbents used in this study, 0.3 mol·L -1 [N 1111] The absorbent formed by complexing with 0.7 mol·L -1 MEA has higher absorption capacity and higher absorption rate. As the temperature increases, the rate of CO 2 absorption by the mixed absorbent increases, but the absorption capacity decreases at equilibrium. CO 2 absorption rate and absorption capacity of mixed absorbent increased with the increase of pressure.