Deep oxidative–extractive desulfurization of fuels using benzyl‐based ionic liquid

Li, Mingxia; Zhou, Zhiyong; Zhang, Fan; Chai, Wenshuai; Zhang, Lele

doi:10.1002/aic.15326

Cited by 35 publications

(24 citation statements)

References 53 publications

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“…The interaction energies between sulfur compounds and [DBU][Im] follow the sequence DBT > 4,6-DMDBT > BT, demonstrating that the calculated results agree well with experimental results. Compared with benzyl-based ILs in our previous work, the interaction energy between DBT and [Bzmim][SCN] was only −67.22 kJ·mol –1 , which is much lower than that obtained in this work. In other words, the calculated interaction energies can demonstrate that the imidazole anion-based ILs prepared in this work are superior to benzyl-based ILs reported previously in removal performance of sulfur compounds.…”

Section: Resultscontrasting

confidence: 83%

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Deep Desulfurization of Fuels Using Imidazole Anion-Based Ionic Liquids

Ren

Zhang

et al. 2018

ACS Sustainable Chem. Eng.

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An extractive desulfurization method was developed with 1,8-diazabicyclo[5.4.0]undec-7-ene Im ([DBU][Im]) and 1,1,3,3-tetramethylguanidine Im ([TMG][Im]) as extractants. Effects of extraction time, ionic liquid (IL):model fuel mass ratio, ILs species, initial concentration of sulfur, and temperature on removal efficiency of sulfur compound were investigated. The removal efficiencies of dibenzothiophene, 4,6-dimethyldibenzothiophene, and benzothiophene with [DBU][Im]/[TMG][Im] as extractants were 79.2%/69.4%, 68.4%/57.7%, and 61.2%/54.4%, respectively. The interaction between [DBU][Im] and sulfur compounds could be enhanced by extra heterocyclic aromatic ring in DBU cation and imidazolium ring in Im anion. Both extraction processes with these two ILs as extractants were fast (extraction equilibrium was reached within 10 min). The reusability of prepared ILs was studied, and the multistage cross-current extraction experiments were performed. Moreover, the characterization methods of nuclear magnetic resonance hydrogen spectrum and Fourier transform infrared spectroscopy and the calculation methods of optimized geometry and interaction energy between sulfur compounds and extractants by Gaussian 09 software were used for the study of extraction mechanism. Furthermore, the oxidative–extractive method was used for deep desulfurization of model fuel and real diesel fuel.

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Section: Resultscontrasting

confidence: 83%

“…The cross dissolve degree between ILs and model fuel was analyzed by the method reported in our previously published paper . The results indicated that both [DBU][Im] and [TMG][Im] nearly cannot dissolve in model fuel.…”

Section: Methodsmentioning

confidence: 99%

Deep Desulfurization of Fuels Using Imidazole Anion-Based Ionic Liquids

Ren

Zhang

et al. 2018

ACS Sustainable Chem. Eng.

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“…56,57 The result suggested that b-CDP has good performance for deep desulfurization. Because of the high synergetic effect of adjacent cyclodextrin cavities in b-CDP and electronic effect between b-CDP and DBT, DBT might be combined with cavities well in molecular recognition and promote the desulfurization performance.…”

Section: 55mentioning

confidence: 92%

Molecular recognition with cyclodextrin polymer: a novel method for removing sulfides efficiently

Duan

Chen

et al. 2017

RSC Adv.

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A series of cyclodextrin polymers (CDPs) were synthesized and they were used for removing different sulfides by molecular recognition. Different CDPs showed a higher desulfurization efficiency for sulfides with an aromatic ring structure than those with an aliphatic chain structure. For different cyclodextrin polymers, b-CDP has a more suitable cavity size for removing DBT. Moreover, it has a good synergetic effect of adjacent cyclodextrin cavities and good electronic interactions with DBT.For these reasons, b-CDP showed the best desulfurization performance, in particular it has good performance for deep desulfurization by forming inclusion complexes and excellent selectivity for removing DBT. Meanwhile, the b-CDP showed good regeneration performance. Various characterization measurements were used to characterize the b-CDP before and after desulfurization of DBT, the results of which showed that it had advantages of wide application temperature range and good structure stability before and after desulfurization. Finally, a molecular recognition mechanism for removing sulfides efficiently was proposed.

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“…Up to date, diverse catalysts, such as ionic liquids (ILs) [6][7][8][9], organic acids [10], polyoxometalates [11][12][13], and metal oxides [14][15][16][17], etc., have been developed in ODS systems. Among those reported highly-active catalysts, ILs, especially task-specific ILs (TSILs), have gained increasing attentions due to their excellent dissolving capacity to both inorganic and organic compounds, adjustable acidity, high stability, etc.…”

Section: Introductionmentioning

confidence: 99%