Mesoporous titania–silica–polyoxometalate nanocomposite materials for catalytic oxidation desulfurization of fuel oil

Yan, Xuemin; Mei, Ping; Xiong, Lin; Gao, Lin; Yang, Qifeng; Gong, Lunjun

doi:10.1039/c3cy20732c

Cited by 119 publications

(55 citation statements)

References 45 publications

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“…One of the strategies to overcome these drawbacks consists of their encapsulation within porous solid matrixes [24][25][26][27][28][29]. Metalorganic frameworks (MOFs) have been shown to be effective supports to incorporate POMs to form efficient heterogeneous catalysts [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Deep extractive desulfurization of oil over 12-molibdophosphoric acid encapsulated in metal-organic frameworks

Rafiee

Nobakht

2015

Korean J. Chem. Eng.

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A desulfurization process for model oil and real oil was investigated based on the chemical oxidation of mixed sulfur containing compounds in the presence of nitrogen compounds (indole and quinoline) using hydrogen peroxide as oxidizing agent and dodecamolibdophosphoric acid (H 3 PMo 12 O 40 ) encapsulated in a kind of metal-organic framework (HKUST-1) as PMo@HKUST-1. The effect of isopropanol, ethanol and acetonitrile as extractive solvent and 1-ring (toluene, xylene and mesitylene) and 2-ring (naphthalene) aromatic hydrocarbons in desulfurization of model oil was studied. The desulfurization of sulfur-containing compounds was accelerated in the presence of aromatic hydrocarbons. In fact, a higher desulfurization efficiency of the heterogeneous catalyst could be achieved with system containing a polar solvent in contact with an aromatic hydrocarbon. Quinoline had no effect on oxidative desulfurization (ODS) reaction, whereas indole had a slightly negative effect. Presence of aromatic compounds had slightly positive effect on ODS reaction.

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Section: Introductionmentioning

confidence: 99%

Deep extractive desulfurization of oil over 12-molibdophosphoric acid encapsulated in metal-organic frameworks

Rafiee

Nobakht

2015

Korean J. Chem. Eng.

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“…The signal of all BFS-TiO2 samples greatly increased as compared to pure TiO2, which meant the density of acid sites was enhanced with the incorporation of SiO2. The formation of Ti-O-Si band was believed to develop more acid sites [42,43]. This result implies that the presence of SiO2 in BFS-TiO2 samples brought more active NH3 adsorbed species, which is reported to be significantly beneficial to SCR reaction [9,13,17].…”

Section: Structure Of Prepared Supportsmentioning

confidence: 51%

“…In the NH3-TPD curves, peaks are generally distributed into two regions: below and above 400 °C, referred to as low-temperature (LT) and high-temperature (HT) regions, respectively. The peaks in the HT region can be attributed to the desorption of NH3 from strong acid sites, and the peak in the LT region is assigned as the desorption of NH3 from some relatively weak acid sites [42]. NH3-TPD profiles of synthetic BFS-TiO2 and TiO2 supports, presented in Figure 5, showed broadly distributed acid sites in the LT region.…”

Section: Structure Of Prepared Supportsmentioning

confidence: 99%

Upgrading V2O5-WO3/TiO2 deNOx Catalyst with TiO2-SiO2 Support Prepared from Ti-Bearing Blast Furnace Slag

Tran

Gan

et al. 2016

Catalysts

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Abstract:The study is devoted to developing a rather high-efficiency NH 3 -SCR (selective catalytic reduction) catalyst for NO x removal using TiO 2 -SiO 2 support made from blast furnace slag. Through adjusting hydrolytic pH value of TiOSO 4 solution obtained from acidolysis of slag with 70 wt. % H 2 SO 4 , a series of TiO 2 -SiO 2 mixed oxides was prepared to have different mass ratios of TiO 2 to SiO 2 . The supports are further impregnated with V 2 O 5 and WO 3 to make the SCR catalysts for NO x removal. Characterizing the catalysts show that silica and unavoidable impurities in support prepared from slag were responsible for maintaining their mesoporous structure and the enhancements in the acidity and reducible form of active species on the catalyst surface, which thus rendered the catalysts to have higher NO x reduction capability than catalyst using commercial TiO 2 . Furthermore, the low-cost catalyst prepared from slag-based TiO 2 support possesses good stability, and strong resistance to SO 2 and H 2 O poisoning, which are beneficial to practical deNO x applications.

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“…6), the effect of crude oil composition on ODS conversion was investigated. Crude oil is the most important source of aromatics and olefins, and they may have a significant effect on ODS (Abdalla et al 2009a, b;Yan et al 2013;Xiao et al 2014). In these systems (PW catalysts), the active sites of the catalyst with H 2 O 2 exhibited considerable activity in epoxidation of alkenes (Wenjia et al 2013;Aoto et al 2014).…”

Section: Effect Of Composition Of Mixed Model Oil On the Ods Conversionmentioning

confidence: 99%

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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Mesoporous titania–silica–polyoxometalate nanocomposite materials for catalytic oxidation desulfurization of fuel oil

Cited by 119 publications

References 45 publications

Deep extractive desulfurization of oil over 12-molibdophosphoric acid encapsulated in metal-organic frameworks

Deep extractive desulfurization of oil over 12-molibdophosphoric acid encapsulated in metal-organic frameworks

Upgrading V2O5-WO3/TiO2 deNOx Catalyst with TiO2-SiO2 Support Prepared from Ti-Bearing Blast Furnace Slag

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

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