DOI: 10.1016/j.jcou.2018.03.001
Scopus记录号: 2-s2.0-85043595789
论文题名: A novel biphasic solvent of amino-functionalized ionic liquid for CO2 capture: High efficiency and regenerability
作者: Huang Q. ; Jing G. ; Zhou X. ; Lv B. ; Zhou Z.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 25 起始页码: 22
结束页码: 30
语种: 英语
英文关键词: Biphasic solvent
; Capture
; CO2
; l-Lysine
; Reaction mechanism
; Triethylenetetramine
Scopus关键词: Amino acids
; Carbon dioxide
; Energy utilization
; Ethanol
; Ionic liquids
; Solubility
; Solvents
; Water absorption
; Biphasic solvent
; Capture
; l-Lysine
; Reaction mechanism
; Triethylenetetramine
; Organic solvents
英文摘要: Due to its great potential of energy consumption saving, the biphasic solvent has attracted more and more attention. In the present work, an efficient absorbent of amino-functionalized ionic liquids (AFILs) was dissolved in ethanol-water solvent to form a novel biphasic solvent for CO2 capture. When the concentration of triethylenetetramine l-lysine ([TETAH][Lys]) was 0.5mol/L and the volume ratio of ethanol-water solvent was 4:6, the [TETAH][Lys] solution separated into two phases after CO2 absorption. Under the optimal conditions, the volume of the CO2-rich phase was about one third of the total volume of the mixture, which meant that only one third of the solution needed to be regenerated and the energy consumption could be greatly reduced. Meanwhile, the loading of the CO2-rich phase contributed about 93% of the total loading of the solution, and its viscosity was only 27.95mPas. The regeneration efficiency of the solvent after the 5th absorption-desorption cycle still kept at 91.3%. Based on the experimental and 13C NMR analysis results, the reaction and phase change mechanisms of CO2 capture into the [TETAH][Lys]-ethanol-water solution were clarified. CO2 absorption into [TETAH][Lys] firstly formed carbamate, which would further hydrolyze to HCO3 -/CO3 2- and react with ethanol to form the ethyl carbonate. Due to the limited solubility of these absorption products in ethanol, as well as the good solubility in H2O, the products transferred to the lower phase while the ethanol stayed in the upper phase in the biphasic system. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111903
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Science and Engineering, College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, 361021, China
Recommended Citation:
Huang Q.,Jing G.,Zhou X.,et al. A novel biphasic solvent of amino-functionalized ionic liquid for CO2 capture: High efficiency and regenerability[J]. Journal of CO2 Utilization,2018-01-01,25