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Efficient and reversible capture of SO2 by pyridinium-based ionic liquids
Alternative TitleChem. Eng. J.
Zeng, Shaojuan1,2; Gao, Hongshuai1; Zhang, Xiaochun1; Dong, Haifeng1; Zhang, Xiangping1; Zhang, Suojiang1
2014-09-01
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume251Issue:1Pages:248-256
AbstractA series of thermally stable pyridinium-based ionic liquids (ILs), including [C4Py][BF4], [C6Py][BF4], [C8Py][BF4], [(C4MPy)-M-3][BF4], [(C6MPy)-M-3][BF4], [(C8MPy)-M-3][BF4], [C4Py][SCN] and [C4Py][Tf2N], were firstly applied as new absorbents for SO2 capture. It was found that among the investigated ILs [C4Py][SCN] has the highest absorption capacity of 0.841 gSO(2) gIL(-1) under ambient conditions, which is much higher than that of the most reported imidazolium-based ILs. The selectivity for SO2/CO2, SO2/N-2 and SO2/O-2 was also studied and the higher selectivity for SO2 to other gases using the [C4Py][SCN] was achieved. Moreover, how the water content affects the absorption capacity of SO2 was further investigated. The absorption mechanism was studied using Fr-IR and NMR spectroscopy, as well as Quantum Chemical calculation and Molecular Dynamic (MD) simulation. It was demonstrated that the physical absorption occurs in pyridinium-based ILs for SO2 capture. Comparing with cation of IL, anion plays a dominant role in SO2 absorption, which was proved both by the interaction enthalpy of IL-SO2 using Quantum Chemical calculation and the experimental results. MD simulation results further confirmed that the higher absorption capacity of SO2 in [C4Py][SCN] is mostly attributed to the stronger electrostatic interaction between the anion and SO2. In addition, the [C4Py][SCN] can still keep the stable absorption performance after five cycles of absorption and desorption, implying the pyridinium-based us show great potentials as cost effective and green absorbents for SO2 capture applications. (C) 2014 Elsevier B.V. All rights reserved.; A series of thermally stable pyridinium-based ionic liquids (ILs), including [C4Py][BF4], [C6Py][BF4], [C8Py][BF4], [(C4MPy)-M-3][BF4], [(C6MPy)-M-3][BF4], [(C8MPy)-M-3][BF4], [C4Py][SCN] and [C4Py][Tf2N], were firstly applied as new absorbents for SO2 capture. It was found that among the investigated ILs [C4Py][SCN] has the highest absorption capacity of 0.841 gSO(2) gIL(-1) under ambient conditions, which is much higher than that of the most reported imidazolium-based ILs. The selectivity for SO2/CO2, SO2/N-2 and SO2/O-2 was also studied and the higher selectivity for SO2 to other gases using the [C4Py][SCN] was achieved. Moreover, how the water content affects the absorption capacity of SO2 was further investigated. The absorption mechanism was studied using Fr-IR and NMR spectroscopy, as well as Quantum Chemical calculation and Molecular Dynamic (MD) simulation. It was demonstrated that the physical absorption occurs in pyridinium-based ILs for SO2 capture. Comparing with cation of IL, anion plays a dominant role in SO2 absorption, which was proved both by the interaction enthalpy of IL-SO2 using Quantum Chemical calculation and the experimental results. MD simulation results further confirmed that the higher absorption capacity of SO2 in [C4Py][SCN] is mostly attributed to the stronger electrostatic interaction between the anion and SO2. In addition, the [C4Py][SCN] can still keep the stable absorption performance after five cycles of absorption and desorption, implying the pyridinium-based us show great potentials as cost effective and green absorbents for SO2 capture applications. (C) 2014 Elsevier B.V. All rights reserved.
KeywordPyridinium Ionic Liquids Sulfur Dioxide Capture Reversible
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2014.04.040
URL查看原文
Indexed BySCI
Language英语
WOS KeywordFLUE-GAS ; HIGHLY EFFICIENT ; DESULFURIZATION PROCESS ; DRY-DESULFURIZATION ; BINARY-MIXTURES ; SOLUBILITY ; ABSORPTION ; IMIDAZOLIUM ; CO2 ; TEMPERATURE
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000338802500029
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Cited Times:96[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/11021
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Beijing Key Lab Ion Liquids Clean Proc, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Coll Chem & Engn, Beijing 100049, Peoples R China
Recommended Citation
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Zeng, Shaojuan,Gao, Hongshuai,Zhang, Xiaochun,et al. Efficient and reversible capture of SO2 by pyridinium-based ionic liquids[J]. CHEMICAL ENGINEERING JOURNAL,2014,251(1):248-256.
APA Zeng, Shaojuan,Gao, Hongshuai,Zhang, Xiaochun,Dong, Haifeng,Zhang, Xiangping,&Zhang, Suojiang.(2014).Efficient and reversible capture of SO2 by pyridinium-based ionic liquids.CHEMICAL ENGINEERING JOURNAL,251(1),248-256.
MLA Zeng, Shaojuan,et al."Efficient and reversible capture of SO2 by pyridinium-based ionic liquids".CHEMICAL ENGINEERING JOURNAL 251.1(2014):248-256.
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