CO2 absorption into aqueous blends of ionic liquid and amine in a membrane contactor
CO2 absorption into aqueous blends of ionic liquid and amine in a membrane contactor
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在膜接触器中将 CO2 吸收到离子液体和胺的水混合物中
DOI：
10.1016/j.seppur.2015.07.010
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发表时间：
2015-08-17
影响因子：
8.6
通讯作者：
Liu, Da-Gang
中科院分区：
文献类型：
--
作者：
Lu, Jian-Gang;Lu, Zhen-Yu;Liu, Da-Gang
将离子液体 (IL)、1-丁基-3-甲基-咪唑鎓四氟硼酸盐 bmim][BF4]) 和 1-(3-氨基丙基)-3-甲基-咪唑鎓四氟硼酸盐 ([apmim][BF4]) 与 2-氨基-2-甲基-1-丙醇 (AMP) 的链烷醇胺混合，形成两种基于 IL 的水性混合物作为 CO2 吸收剂，分别。膜吸收耦合过程用于评估基于 IL 的水性混合吸收剂捕获 CO2 的性能。研究了 IL 与 AMP 的混合过程。分别通过循环和非循环吸收操作、静态热再生和连续循环吸收再生模式，研究了膜接触器与IL基混合吸收剂的耦合过程特性。结果表明，在 IL 中添加 AMP 可以增强基于 IL 的混合物的膜通量和负载能力。 [apmim][BF4]+AMP的膜通量和负载量分别达到1.05 x 10(-3) mol m(-2) s(-1)和0.65 mol mol(-1)。通过静态热再生，IL 基吸收剂的再生效率几乎达到 100%。在吸收与再生连续循环的耦合过程中，与相应的单一离子液体相比，混合吸收剂能够提供更高的净吸收能力和循环吸收能力。 [apmim][BF4]+AMP的净吸收容量达到0.48 mol mol(-1)。混合到离子液体中的 AMP 显着影响基于离子液体的吸收剂的性能以及偶联过程。 (C) 2015 Elsevier B.V. 保留所有权利。
Ionic liquids (ILs), 1-butyl-3-methyl-imidazolium tetrafluoroborate bmim][BF4]) and 1-(3-aminopro pyl)-3-methyl-imidazolium tetrafluoroborate ([apmim][BF4]), were mixed with an alkanolamine of 2-amino-2-methyl-1-propanol (AMP) to form two IL-based aqueous blends as CO2 absorbents, respectively. A membrane absorption coupling process was used to evaluate the performance of the IL-based aqueous blended absorbents for CO2 capture. Mixed process of the ILs with the AMP was investigated. Characteristics of the coupling process of the membrane contactor with the IL-based blended absorbents were studied by various modes of cyclic and non-cyclic absorption operations, static hot regeneration, and continuous circulation of absorption and regeneration, respectively. Results show that membrane flux and loading capacity of the IL-based blends could be enhanced by an addition of AMP into the ILs. Membrane flux and loading capacity of [apmim][BF4]+AMP reached 1.05 x 10(-3) mol m(-2) s(-1)and 0.65 mol mol(-1), respectively. A regeneration efficiency of almost 100% for the IL-based absorbents could be obtained by the static hot regeneration. The blended absorbents could give higher net and circular absorption capacities comparing with the corresponding single ILs in the coupling process of continuous circulation of absorption and regeneration. Net absorption capacities of [apmim][BF4]+AMP arrived at 0.48 mol mol(-1). AMP mixed into ILs significantly influenced the performance of the IL-based absorbents as well as the coupling process. (C) 2015 Elsevier B.V. All rights reserved.