文献类型：期刊文献

英文题名：CO2 capture by 1-ethyl-3-methylimidazolium acetate: Solubility at low pressure and quantification of chemisorption and physisorption

作者：Mei, Mingcan[1];Hu, Xutao[1];Song, Zhen[1];Chen, Lifang[1];Deng, Liyuan[2];Qi, Zhiwen[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, Sem Saelandsvei 4, N-7491 Trondheim, Norway

年份：2022

卷号：348

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：;EI(收录号：20214811244973);WOS:【SCI-EXPANDED(收录号:WOS:000754563200001)】；

基金：The financial support from National Natural Science Foundation of China (21861132019 and 21576081) and Natural Science Foundation of Shanghai (19ZR1412500) is greatly acknowledged.

语种：英文

外文关键词：CO2 absorption; Ionic liquids; Chemi-physisorption; Chemisorption and physisorption quantification; Quantitative NMR

摘要：Although chemisorptive ionic liquids (ILs) are widely expected as promising CO2 absorbents, rigorous thermodynamic analyses for such systems remain challenging due to the inevitable co-existence of chemisorption and physisorption. In this work, an experimental approach combining quantitative NMR (qNMR) spectroscopy and mass balance is proposed to straightforwardly quantify the chemisorption and physisorption of CO2 in chemisorptive absorbent, and 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) is selected for an exemplary study. The total CO2 solubility in [Emim][OAc] is measured by the pressure drop method, of which the chemisorption part is quantified by qNMR and the physisorption part is then determined by mass balance. Correspondingly, a large set of CO2 solubilities at four temperatures (298.15 K, 313.15 K, 323.15 K, and 348.15 K) covering the low pressure range below 100 kPa are determined, where the chemisorption and physisorption contribution are distinguished quantitatively. Following that, thermodynamic analyses for the CO2 absorption by [Emim][OAc] are made from chemisorption and physisorption point of view, respectively. (C) 2021 Elsevier B.V. All rights reserved.