Fabrication and characterization of tungsten-containing mesoporous silica for heterogeneous oxidative desulfurization

Zhang, Ming; Zhu, Wenshuai; Li, Hongping; Xun, Suhang; Li, Meng; Li, Yanan; Wei, Yanchen; Li, Huaming

doi:10.1016/s1872-2067(15)61103-2

Cited by 33 publications

(19 citation statements)

References 58 publications

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“…In addition, Zhu, Li and coworkers reported the ability of an imidazolium IL (C 16 MImBr) to direct the synthesis of a WO 3 -SiO 2 composite towards a mesoporous material (W-SiO 2 -20, Figure 10), which exhibited a high dispersion of tungsten throughout the structure (enhancing the catalytic activity) [129]. The synthesis of the mesoporous catalyst was carried out starting from a polyoxometalate compound ([C 16 mim] 3 PW 12 O 40 ) in a one-pot gel of tetraethyl orthosilicate, which was then calcinated at 550 • C. The mesoporous catalyst was characterized using the usual techniques and efficiently used in ODS reactions (Figure 11) at the low temperature of 60 °C.…”

Section: Wo 3 and Ionic Liquids In Oxidative Desulfurization (Ods)mentioning

confidence: 99%

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WO3 and Ionic Liquids: A Synergic Pair for Pollutant Gas Sensing and Desulfurization

D’Anna

Grilli

Petrucci

et al. 2020

Metals

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This review deals with the notable results obtained by the synergy between ionic liquids (ILs) and WO3 in the field of pollutant gas sensing and sulfur removal pretreatment of fuels. Starting from the known characteristics of tungsten trioxide as catalytic material, many authors have proposed the use of ionic liquids in order to both direct WO3 production towards controllable nanostructures (nanorods, nanospheres, etc.) and to modify the metal oxide structure (incorporating ILs) in order to increase the gas adsorption ability and, thus, the catalytic efficiency. Moreover, ionic liquids are able to highly disperse WO3 in composites, thus enhancing the contact surface and the catalytic ability of WO3 in both hydrodesulfurization (HDS) and oxidative desulfurization (ODS) of liquid fuels. In particular, the use of ILs in composite synthesis can direct the hydrogenation process (HDS) towards sulfur compounds rather than towards olefins, thus preserving the octane number of the fuel while highly reducing the sulfur content and, thus, the possibility of air pollution with sulfur oxides. A similar performance enhancement was obtained in ODS, where the high dispersion of WO3 (due to the use of ILs during the synthesis) allows for noteworthy results at very low temperatures (50 °C).

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Section: Wo 3 and Ionic Liquids In Oxidative Desulfurization (Ods)mentioning

confidence: 99%

“…DBT: dibenzothiophene; BT: benzothiophene; 4,6-DMDBT: 4,6-dimethyldibenzothiophene; DT: 1-dodecanethiol. Reproduced with permission[129]. Copyrights 2016, Elsevier.…”

mentioning

confidence: 99%

WO3 and Ionic Liquids: A Synergic Pair for Pollutant Gas Sensing and Desulfurization

D’Anna

Grilli

Petrucci

et al. 2020

Metals

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“…Among them, titanium dioxide, activated carbon, alumina, silica, etc., have received extensive attention [18]. Silica is widely used due to its easy production, low price, and rich surface pore structure [19]. Qiu [20] et al reported the preparation of a mesoporous silica material containing phosphomolybdic acid and investigated its oxidative desulfurization performance.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Deep Oxidative Desulfurization of Fuel with H2O2 Catalyzed by Mesoporous Silica-Supported Molybdenum Oxide Modified by Ce

Chen

Tian

et al. 2021

Applied Sciences

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A mesoporous silica-supported molybdenum oxide catalyst with a cerium(Ce) modifier was prepared by in situ synthesis and used in a hydrogen peroxide (H2O2) system for the desulfurization of dibenzothiophene (DBT), benzothiophene (BT), and 4,6-dimethyldibenzothiophene (4,6-DMDBT) fuel oils. The catalytic performance of the catalyst was studied. The catalyst was characterized by Fourier Transform Infra-Red(FT-IR), X-ray diffraction (XRD), Brunner−Emmet−Teller (BET), and X-ray Photoelectron Spectroscopy(XPS). The influences of m(catalyst)/m(fuel oil), v(H2O2)/v(fuel oil), reaction temperature, and reaction time were investigated. The catalyst had excellent catalytic oxidation desulfurization performance under moderate operational conditions. The catalytic performance was in the order DBT > 4,6-DMDBT > BT. The kinetic analysis results showed that the reaction was a pseudo first-order kinetics process and the apparent activation energies of DBT, BT, and 4,6-DMDBT were 46.67 kJ/mol, 56.23 kJ/mol, and 55.54 kJ/mol, respectively. The reaction products of DBT, BT, and 4,6-DMDBT were DBTO2, BTO2, and 4,6-DMDBTO2, respectively. The recycling experiments indicated that DBT, BT, and 4,6-DMDBT removal could still reach levels of 94.0%, 63.0%, and 77.9% after five cycles.

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“…Environmental protocols in this regard become stricter day by day [1,2]. There are various techniques for the desulfurization of oil fuels such as selective adsorption, extractive separation, hydrodesulfurization (HDS) and oxidative desulfurization (ODS) [3][4][5][6][7][8][9][10][11][12][13][14]. Among various desulfurization methods, HDS is considered as a common and practical method for sulfur removal in the petroleum refineries [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…ODS has been confirmed to be one of the most promising and favorable alternative desulfurization processes to achieve ultra-low sulfur content fuels [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Desulfurization under mild conditions (temperature lower than 100 o C and atmospheric pressure) in the liquid phase is the utmost advantage of ODS as compared to the conventional HDS.…”

Section: Introductionmentioning

confidence: 99%

Highly catalytic oxidative desulfurization and denitrogenation of diesel using anchored-silica-gel vanadium-substituted Dawson-type polyoxometalate

et al. 2019

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The aim of this article is to study the extractive-catalytic oxidative desulfurization (ECODS) of the model oil containing several model S-containing compounds as well as N-containing compound using a heterogeneous vanadium substituted Dawson-type polyoxometalate catalyst under atmospheric pressure and temperature lower than 100 o C. The catalyst was prepared by ion exchange with alkyl ammonium derivatives covalently anchored to silica gel.The potential of this methodology was illustrated by oxidation of 100% quinoline and 80% of total sulfur in model oil containing 500 ppmw sulfur and 70% of total sulfur in model oil 1500 ppmw in less than 30 minutes of reaction, in the absence of solvent. However, when acetonitrile was employed as an extractive solvent, the desulfurization was increased considerably. Under the reaction conditions, activated catalyst and acetonitrile, solvent to oil ratio 1:6, could remove approximately 100% of quinoline, 95% of sulfur from 500-ppmw model oil, 87% of sulfur from 1500-ppmw model oil in less than 30 min. The catalyst is very active in ECODS and can be reused fifth times from 500-ppmw model oil and third times from 1500-ppmw model oil without an important decrease in activity. The ECODS could remove 83% of total sulfur from 1235-ppmw-S real diesel.

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Fabrication and characterization of tungsten-containing mesoporous silica for heterogeneous oxidative desulfurization

Cited by 33 publications

References 58 publications

WO3 and Ionic Liquids: A Synergic Pair for Pollutant Gas Sensing and Desulfurization

WO3 and Ionic Liquids: A Synergic Pair for Pollutant Gas Sensing and Desulfurization

Ultra-Deep Oxidative Desulfurization of Fuel with H2O2 Catalyzed by Mesoporous Silica-Supported Molybdenum Oxide Modified by Ce

Highly catalytic oxidative desulfurization and denitrogenation of diesel using anchored-silica-gel vanadium-substituted Dawson-type polyoxometalate

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