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Protic ionic liquids extract asphaltenes from direct coal liquefaction residue at room temperature
Bai, Lu1,2; Nie, Yi1; Li, Yi1; Dong, Haifeng1; Zhang, Xiangping1
2013-04-01
Source PublicationFUEL PROCESSING TECHNOLOGY
Volume108Issue:0Pages:94-100
AbstractAsphaltenes in direct coal liquefaction residue (DCLR) are highly aromatic and polydisperse mixtures, which are important precursors for producing high value-added carbon materials. In this research, a series of protic ionic liquids (PILs) with organic carboxylate anions were synthesized and applied to extract asphaltenes from DCLR at room temperature. The extracts were characterized by elemental analysis, FTIR, C-13-NMR, quinoline insolubles tests and so on. The results show that asphaltenes with the potential of precursors of carbon materials can be separated from DCLR at room temperature using PILs and the solid-liquid separation is carried out facilely due to the lower viscosities of PILs. The influences of PILs structures on extraction yields and atomic ratios of H/C were also investigated. As alkyl chain length of PILs anions increases, extraction yields of asphaltenes increase while H/C ratios decrease. Moreover, extraction yields vary with various cations of PILs and increase according to the order of N-methylimidazolium ([MIM](+)) < triethylammonium ([TEtA](+)) < 3-methylpyridinium ([MPy](+)), but H/C ratios decrease following the order of N-methylimidazolium ([MIM](+)) > triethylammonium ([TEtA](+)) > 3-methylpyridinium ([MPy](+)). The asphaltenes extracted from DCLR with PILs have the excellent properties for preparing carbon materials, such as lower H/C ratios, higher aromaticities, lower sulfur contents and nearly no quinoline insolubles. (C) 2012 Elsevier B.V. All rights reserved.
KeywordDirect Coal Liquefaction Residue Ionic Liquids Asphaltenes Extraction
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI ; ISTP
Language英语
WOS KeywordARGONNE PREMIUM COALS ; PHYSICOCHEMICAL PROPERTIES ; SOLVENTS ; DISSOLUTION ; COMPONENTS ; PETROLEUM ; MIXTURES ; PYRIDINE ; OILS ; NMR
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Energy & Fuels ; Engineering, Chemical
WOS IDWOS:000316510700016
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13747
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Coll Chem & Chem Engn, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Bai, Lu,Nie, Yi,Li, Yi,et al. Protic ionic liquids extract asphaltenes from direct coal liquefaction residue at room temperature[J]. FUEL PROCESSING TECHNOLOGY,2013,108(0):94-100.
APA Bai, Lu,Nie, Yi,Li, Yi,Dong, Haifeng,&Zhang, Xiangping.(2013).Protic ionic liquids extract asphaltenes from direct coal liquefaction residue at room temperature.FUEL PROCESSING TECHNOLOGY,108(0),94-100.
MLA Bai, Lu,et al."Protic ionic liquids extract asphaltenes from direct coal liquefaction residue at room temperature".FUEL PROCESSING TECHNOLOGY 108.0(2013):94-100.
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