Absorption of H2S and CO2 in Aqueous Solutions of Tertiary-Amine Functionalized Protic Ionic Liquids
Absorption of H2S and CO2 in Aqueous Solutions of Tertiary-Amine Functionalized Protic Ionic Liquids
复制标题
叔胺功能化质子离子液体水溶液中 H2S 和 CO2 的吸收
DOI：
10.1021/acs.energyfuels.7b03049
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发表时间：
2017-12-01
期刊：
影响因子：
5.3
通讯作者：
We, You-Ting
中科院分区：
文献类型：
--
作者：
Huang, Kuan;Zhang, Jia-Yin;We, You-Ting
用于从CO2中选择性分离H2S的基于离子液体的吸收剂的开发是天然气工业感兴趣的。本工作通过将二元胺化合物中的一个叔胺基团用乙酸中和，使另一个叔胺基团作为选择性吸收H2S的功能位点，合成了一系列叔胺功能化质子离子液体（TA-PIL）。为了克服纯离子液体的高粘度，将TA-PIL溶解在水中以得到混合吸收剂。系统地研究了TA-PIL种类、浓度和温度对H2S和CO2在TA-PIL中溶解度的影响以及TA-PIL吸收H2S和CO2的动力学。通过关联溶解度数据和反应平衡热力学模型，计算了H2S和CO2在TA-PIL水溶液中的反应平衡常数和吸收焓。结果表明，TA-PIL水溶液对H_2O_3有很高的吸附能力。
The development of ionic liquid-based absorbents for selective separation of H2S from CO2 is of interest to the natural gas industry. In this work, a series of tertiary-amine functionalized protic ionic liquids (TA-PILs) were synthesized by neutralizing one of the tertiary amine groups in diamine compounds with acetic acid, leaving the other tertiary amine group as the functional site for selective absorption of H2S. To overcome the high viscosity of pure ionic liquids, TA-PILs were dissolved in water to give mixed absorbents. The effects of TA-PIL species, TA-PIL concentration, and experimental temperature on the solubilities of H2S and CO2, and absorption kinetics of H2S and CO2 in aqueous TA-PILs were investigated systematically. The reaction equilibrium constants and absorption enthalpy of H2S and CO2 in aqueous TA-PILs were also calculated by correlating the solubility data with a reaction equilibrium thermodynamic model. Results demonstrated that aqueous TA-PILs have high absorption capacities for H...