Experimental investigation on the solubility and initial rate of absorption of CO2 in aqueous mixtures of methyldiethanolamine with the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate
Experimental investigation on the solubility and initial rate of absorption of CO2 in aqueous mixtures of methyldiethanolamine with the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate
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DOI：
10.1021/je1006949
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发表时间：
2010-11
影响因子：
--
通讯作者：
A. Ahmady;M. Hashim;M. Aroua
中科院分区：
文献类型：
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作者：
A. Ahmady;M. Hashim;M. Aroua
本文研究了在（303、313、323和333）K下，CO2在4 M甲基二乙醇胺（MDEA）水溶液中与不同浓度1-丁基-3-甲基咪唑四氟硼酸盐（[bmim][BF 4]）混合时的初始吸收速率和溶解度。所有实验均在低于110 kPa的低CO2分压下进行。研究结果表明，在4 mol·L−1 MDEA水溶液中，低浓度[bmim][BF 4]的存在对混合物的吸附容量没有显著影响，但提高了初始吸附速率。在混合物中存在高浓度的离子液体时，胺CO2负载能力显示出显著降低。
In this paper we present the results of the initial absorption rate and solubility of CO2 in aqueous 4 M methyldiethanolamine (MDEA) mixed with various concentrations of 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) at (303, 313, 323, and 333) K. All experiments were carried out at low partial pressures of CO2, below 110 kPa. The results of this research suggested that the presence of a low concentration of [bmim][BF4] in aqueous 4 mol·L−1 MDEA has no significant effect on the mixture loading capacity, but increased the initial absorption rate. The amine CO2 loading capacity showed a significant decrease in the presence of high concentrations of ionic liquid in the mixture.