Deep oxidative desulfurization of dibenzothiophene with POM-based hybrid materials in ionic liquids

Zhang, Ming; Zhu, Wenshuai; Xun, Suhang; Li, Huaming; Gu, Qingqing; Zhao, Zhen; Wang, Qian

doi:10.1016/j.cej.2012.11.138

Cited by 240 publications

(104 citation statements)

References 87 publications

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“…The results showed that the conversion of DBT was 46 % and 28 %, respectively, which did not meet the requirement of deep desulfurization. It was due to the lack of a suitable reaction medium, and DBT could not effectively contact the H 2 O 2 (Zhang et al 2013). In both cases, noticeable transformation of DBT into sulfone was not observed on the TLC plate.…”

Section: Dbt Oxidative Desulfurization (Ods)mentioning

confidence: 95%

“…These compounds are removed by polar solvents such as methanol (Abdalla and Li 2012), N,N-dimethylformamide (DMF) (Bakar et al 2012), acetonitrile (MeCN) and DMSO (Hassan et al 2013). In recent years, there has been an increasing interest in polyoxometalates (POMs) as catalysts due to their composition, size, shape, photochemical response, ionic charge, acidic properties and tunable redox properties (Zhang et al 2013). Heteropoly acids (HPAs) and supported HPAs are widely used as catalysts in various acid-catalyzed reactions and partial oxidation reactions because of their strong acidity and oxidation activity (Chamack et al 2014;Zhang et al 2011a, b;Te et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Extractive oxidative desulfurization of model oil/crude oil using KSF montmorillonite-supported 12-tungstophosphoric acid

2016

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12-Tungstophosphoric acid (PW) supported on KSF montmorillonite, PW/KSF, was used as catalyst for deep oxidative desulfurization (ODS) of mixed thiophenic compounds in model oil and crude oil under mild conditions using hydrogen peroxide (H 2 O 2 ) as an oxidizing agent. A one-factor-at-a-time method was applied for optimizing the parameters such as temperature, reaction time, amount of catalyst, type of extractant and oxidant-tosulfur compounds (S-compounds) molar ratio. The corresponding products can be easily removed from the model oil by using ethanol as the best extractant. The results showed high catalytic activity of PW/KSF in the oxidative removal of dibenzothiophene (DBT) and mixed thiophenic model oil under atmospheric pressure at 75°C in a biphasic system. To investigate the oxidation and adsorption effects of crude oil composition on ODS, the effects of cyclohexene, 1,7-octadiene and o-xylene with different concentrations were studied.

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Section: Dbt Oxidative Desulfurization (Ods)mentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Extractive oxidative desulfurization of model oil/crude oil using KSF montmorillonite-supported 12-tungstophosphoric acid

2016

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“…In addition, HDS is usually carried out under harsh conditions such as high temperature, high pressure, and high operating cost. Under such circumstances, several non-HDS methods have been explored, e.g., extraction [6,7], adsorption [8,9], oxidation [10][11][12][13][14][15][16], biodesulfurization [17], and electrochemical technology [18]. Among them, oxidative desulfurization (ODS) is considered to be one of the promising techniques for deep desulfurization of fuel, which generally takes place under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Oxidative Desulfurization of Dibenzothiophene by Functional Mo‐Containing Mesoporous Silica

et al. 2014

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Functional mesoporous Mo-SiO 2 materials were synthesized by a one-pot and facile room-temperature procedure, and characterized by X-ray diffraction, TEM, Raman spectroscopy, FT-IR, diffuse reflectance spectra, and BET analysis. The experimental results demonstrated that the mesoporous materials presented a high dispersion of molybdenum species and excellent catalytic activity for the removal of dibenzothiophene (DBT) without organic solvents as extractants. The catalytic performance on different sulfur-containing compounds was also investigated in detail. After recycling for eight times, the removal of the oxidation desulfurization system could still reach high values. GC-MS analysis detected the oxidation product of DBT. A mechanism was proposed for the absorptive oxidation process of sulfur compounds.

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“…Such side reactions can lead to a decrease in the octane number of gasoline (Nie et al 2006;Wang et al 2007). Therefore, from both environmental and economic considerations, various alternative deep desulfurization processes have been extensively developed in the past few years, including adsorptive and complexation desulfurization (Mansouri et al 2014;Sevignon et al 2005;Shi et al 2015), biodesulfurization (Boshagh et al 2014;Fernandez et al 2014), extractive desulfurization (Mokhtar et al 2014;Domanska et al 2014;Krolikowski et al 2013), and oxidative desulfurization (ODS) followed by extraction (Zhang et al 2013;Ma et al 2014). …”

Section: Introductionmentioning

confidence: 99%

Efficient desulfurization of gasoline fuel using ionic liquid extraction as a complementary process to adsorptive desulfurization

Nejad

Beigi

2015

Pet. Sci.

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The extractive desulfurization of a model gasoline containing several alkyl thiols and aromatic thiophenic compounds was investigated using two imidazolium-based ionic liquids (ILs), 1-butyl-3-methylimidazolium tetrachloroaluminate, and 1-octyl-3-methylimidazolium tetrafluoroborate, as extractants. A fractional factorial design of experiments was employed to evaluate the effects and possible interactions of several process variables. Analysis of variance tests indicated that the number of extraction steps and the IL/gasoline volume ratio were of statistically highly significant, but none of the interactions were significant. The results showed that the desulfurization efficiency of the model gasoline by the ILs could reach 95.2 % under the optimal conditions. The optimized conditions were applied to study the extraction of thiophenic compounds in model gasoline and several real gasoline samples; the following order was observed in their separation: benzothiophene [ thiophene [ 3-methylthiophene [ 2-methylthiophene, with 96.1 % removal efficiency for benzothiophene. The IL extraction was successfully applied as a complementary process to the adsorptive desulfurization with activated Raney nickel and acetonitrile solvent. The results indicated that the adsorptive process combined with IL extraction could provide high efficiency and selectivity, which can be regarded as a promising energy efficient desulfurization strategy for production of low-sulfur gasoline.

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Deep oxidative desulfurization of dibenzothiophene with POM-based hybrid materials in ionic liquids

Cited by 240 publications

References 87 publications

Extractive oxidative desulfurization of model oil/crude oil using KSF montmorillonite-supported 12-tungstophosphoric acid

Extractive oxidative desulfurization of model oil/crude oil using KSF montmorillonite-supported 12-tungstophosphoric acid

Enhanced Oxidative Desulfurization of Dibenzothiophene by Functional Mo‐Containing Mesoporous Silica

Efficient desulfurization of gasoline fuel using ionic liquid extraction as a complementary process to adsorptive desulfurization

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