离子液体
喹啉
化学
咔唑
吡啶
萃取(化学)
煤焦油
有机化学
溴化物
氢键
溶剂
无机化学
煤
催化作用
分子
作者
Lianzheng Zhang,Dongmei Xu,Jun Gao,Shixue Zhou,Liwen Zhao,Zhishan Zhang
出处
期刊:Fuel
[Elsevier]
日期:2017-04-01
卷期号:194: 27-35
被引量:89
标识
DOI:10.1016/j.fuel.2016.12.095
摘要
Coal tar is one of the valuable chemical materials and energy, from which the nitrogen-containing compounds (N-compounds), indole, carbazole, pyridine, and quinoline, are mainly separated. In the present work, the imidazolium-based ILs with different anions, 1-butyl-3-methyl-imidazolium chloride (BmimCl), 1-butyl-3-methyl-imidazolium bromide (BmimBr), 1-butyl-3-methyl-imidazolium tetrafluoroborate (BmimBF4), 1-butyl-3-methyl-imidazolium disulfate (BmimHSO4), and 1-butyl-3-methyl-imidazolium acetate (BmimCH3COO), were used to separate those N-compounds via extraction. The performances of ILs extraction were evaluated by the extraction efficiency and distribution coefficient. High extraction efficiency and selectivity could be found for the neutral N-compounds, indole and carbazole, by BmimCl than basic N-compounds, pyridine and quinoline. Meanwhile, the optimized conditions were ascertained and the selected ILs could be easily regenerated by water and be sustainable recycled by a back-extraction process. Furthermore, a hydrogen bond was formed between the neutral N-compound and the selected ILs, and the mechanism was confirmed based on the analysis by a molecular simulation. Thus, an approach was provided for the separation of neutral N-compounds from coal tar.
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