Design and synthesis of W-containing mesoporous material with excellent catalytic activity for the oxidation of 4,6-DMDBT in fuels

Xun, Suhang; Zhu, Wenshuai; Zhu, Fuliang; Chang, Yonghui; Zheng, Dan; Qin, Yuejiao; Zhang, Ming; Jiang, Wei; Li, Huaming

doi:10.1016/j.cej.2015.05.092

Cited by 40 publications

(18 citation statements)

References 67 publications

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“…The actual fuel is complicated because of its components including olefins, aromatics and many other compounds (Xun et al 2015;Wu et al 2017;Xiao et al 2014). In order to examine the effect of olefins and aromatics on sulfur removal, toluene, p-xylene and cyclohexene were added to the model oil with DBT as the modeled sulfur compound.…”

Section: Effects Of Fuel Composition On Sulfur Removalmentioning

confidence: 99%

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

et al. 2018

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Deep eutectic solvents (DESs) are a new class of green solvents analogous to ionic liquids due to their biodegradable capacity and low cost. However, the direct extractive desulfurization of diesel oil by DESs cannot meet the government's standard. In this work, amphiphilic polyoxometalates were synthesized and characterized by FT-IR and mass spectrometry. The oxidative desulfurization results showed that benzothiophene (BT) could be completely removed by employing a [(C 6 H 13) 3 P(C 14 H 29)] 3 PMo 12 O 40 , DES (ChCl/2Ac) and H 2 O 2 system. It was also found that the organic cation of catalysts played a positive role in oxidative desulfurization. The reaction conditions, such as reaction temperature and time, the amount of catalyst and DES and H 2 O 2 /S (O/S) molar ratio, were optimized. Different sulfides were tested to determine the desulfurization selectivity of the optimal reaction system, and it was found that 97.2% of dibenzothiophene (DBT) could be removed followed by 80.7% of 4-MDBT and 76.0% of 4,6-DMDBT. After reaction, the IR spectra showed that the catalyst [(C 6 H 13) 3 P(C 14 H 29)] 3 PMo 12 O 40 was stable during the reaction process and the oxidative product was dibenzothiophene sulfone (DBTO 2). Furthermore, the catalyst can be regenerated and recycled for four runs with little loss of activity.

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Section: Effects Of Fuel Composition On Sulfur Removalmentioning

confidence: 99%

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

et al. 2018

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“…Below 250°C, C 16 PMo IL was considered to be in a thermodynamically stable state. The slope of the TG curve declined first between 280 and 400°C, indicating a collapse of the hexadecane branch in C 16 PMo IL (Zhang et al 2013;Xun et al 2015). The second dramatic fall of the curve appeared from 400 to 600°C, attributed to anion decomposition in the phosphomolybdic acid-modified ionic liquid.…”

Section: Oxidative Desulfurization Of Model Oilmentioning

confidence: 96%

“…The main cause of SO x release is the combustion of sulfur-containing fuels. To handle this, ultralow-sulfur and even sulfur-free fuels are necessary (Li et al 2009;Xun et al 2015;Rafiee et al 2016). Standard regulations for ultralow-sulfur diesel oil (less than 10 ppm) are formulated by governments and multinational organizations (Zheng et al 2013;Khodayari and Odenbrand 2001;Guldhe et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Amorphous TiO2-supported Keggin-type ionic liquid catalyst catalytic oxidation of dibenzothiophene in diesel

Wang

Xun

et al. 2018

Pet. Sci.

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Supported ionic liquid (IL) catalysts [C n mim] 3 PMo 12 O 40 /Am TiO 2 (amorphous TiO 2) were synthesized through a one-step method for extraction coupled catalytic oxidative desulfurization (ECODS) system. Characterizations such as FTIR, DRS, wide-angle XRD, N 2 adsorption-desorption and XPS were applied to analyze the morphology and Keggin structure of the catalysts. In ECODS with hydrogen peroxide as the oxidant, it was found that ILs with longer alkyl chains in the cationic moiety had a better effect on the removal of dibenzothiophene. The desulfurization could reach 100% under optimal conditions, and GC-MS analysis was employed to detect the oxidized product after the reaction. Factors affecting the desulfurization efficiencies were discussed, and a possible mechanism was proposed. In addition, cyclic experiments were also conducted to investigate the recyclability of the supported catalyst. The catalytic activity of [C 16 mim] 3 PMo 12 O 40 /Am TiO 2 only dropped from 100% to 92.9% after ten cycles, demonstrating the good recycling performance of the catalyst and its potential industrial application.

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“…[4][5][6] Also in favor of ODS, several studies have reported that the refractory molecules in HDS are the most reactive in ODS, in relation with the electron density on the sulfur atom: molecules with low electron density such as benzothiophene are less reactive than DBT and its derivatives. [7][8][9][10] Comparing the reactivity of the alkyl-dibenzothiophenes, the desulfurization efficiency has been reported to decrease in the order: DBT > 4-MDBT > 4,6-DMDBT, thus mainly governed by the steric hindrance of the alkyl substituents near the sulfur atom. [11][12][13][14][15] At the opposite, Sampanthar et al observed that in their conditions of ODS of a model diesel, the oxidative reactivity followed the order: 4,6-DEDBT > 4,6-DMDBT > 4-MDBT > DBT, and that the increased electron density on the sulfur atom can compensate for the steric hindrance of the C4 and C6 alkyl groups.…”

Section: Introductionmentioning

confidence: 99%

Sulfur compounds reactivity in the ODS of model and real feeds on W–SBA based catalysts

et al. 2018

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Design and synthesis of W-containing mesoporous material with excellent catalytic activity for the oxidation of 4,6-DMDBT in fuels

Cited by 40 publications

References 67 publications

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

Catalytic oxidative desulfurization of fuels in acidic deep eutectic solvents with [(C6H13)3P(C14H29)]3PMo12O40 as a catalyst

Amorphous TiO2-supported Keggin-type ionic liquid catalyst catalytic oxidation of dibenzothiophene in diesel

Sulfur compounds reactivity in the ODS of model and real feeds on W–SBA based catalysts

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