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    Property of diethanolamine glycinate ionic liquid and its performance for CO2 capture

    Year: 2015

    Journal: JOURNAL OF MOLECULAR LIQUIDS, Vol. 211, p 1-6, 20170208

    Authors: Lu, Jian-Gang; Lu, Zhen-Yu; Gao, Liu; Cao, Shuang; Wang, Jia-Ting; Gao, Xiang; Tang, Yin-Qin; Tan, Wen-Yi

    Organizations: Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China; Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Jiangsu, Peoples R China; Nanjing Inst Technol, Dept Environm Engn, Nanjing 211167, Jiangsu, Peoples R China

    A protic ionic liquid (IL), diethanolamine glycinate ([IDEA][GLY]), was synthesized and characterized. Its physical properties, including density, viscosity, surface tension, conductivity and refractive index, were determined. CO2 solubility in [DEA][GLY] IL was also measured. Performances of [DEA][GLY] IL in absorbing CO2 in a bubble column were evaluated. The synthesized [DEA][GLY] is an amino acid-functionalized IL with dual groups of ammonium and amino. There was a good CO2 solubility in the IL at room temperature and atmospheric pressure, much better than the traditional ILs. Pure and aqueous [DEA][GLY] ILs are good CO2 absorbents. CO2 partial pressure and IL concentration have a significant impact on their absorption performance. [DEA][GLY] had an obvious advantage over the conventional ILs for CO2 absorption. (C) 2015 Elsevier B.V. All rights reserved.