Synthesis, characterization and catalytic properties of mesoporous HPMo/SiO2 composite

Yan, Xuemin; Yan, Jiabao; Mei, Ping; Lei, Jiaheng

doi:10.1007/s11595-007-6834-z

Cited by 8 publications

(2 citation statements)

References 20 publications

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“…In this work, their catalytic activity followed the order of K 5 H 2 [FeW 11 VO 40 ] >K 3 [PW 12 O 40 ] >K 4 [SiW 12 O 40 ]. From Table , it is evident that the synthesized FeW 11 V@CTAB‐MMT catalyst could significantly promote the ODS efficiency in comparison with other reported catalysts . The optimum dosage of the FeW 11 V@CTAB‐MMT catalyst also was determined for the ODS of gasoline and RTCs present in simulated fuel with a concentration of 500 ppmw (Table ).…”

Section: Resultsmentioning

confidence: 95%

Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Rezvani

Khandan

2018

Applied Organom Chemis

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A new nanocomposite (FeW 11 V@CTAB-MMT) was designed on the basis of vanadium-substituted tungstoferrate (FeW 11 V) and cetyltrimethylammonium bromide-modified montmorillonite (CTAB-MMT) as an efficient nanocatalyst for oxidative desulfurization (ODS) of gasoline. The synthesized catalyst was characterized using various techniques. To evaluate the catalytic activity of FeW 11 V@CTAB-MMT, ODS was carried out using a mixture of aqueous acetic acid and hydrogen peroxide solution as an oxidant and acetonitrile solvent as an extractant. The ODS results revealed that the removal efficiencies of thiophene, benzothiophene and dibenzothiophene were more than 97% in the presence of the FeW 11 V@CTAB-MMT catalyst at 35°C after 1 h. Kinetics of the catalytic ODS reactions was found to be pseudo-first-order. The prepared heterogeneous catalyst was found to be reusable for five runs without a discernible decrease in its activity. The current research provides insight into a new catalytic system for the ODS process for the deep removal of hazardous sulfur molecules from gasoline.

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Section: Resultsmentioning

confidence: 95%

Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Rezvani

Khandan

2018

Applied Organom Chemis

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“…Starting about fifteen years ago, a novel phosphomolybdic (HPMo)/SiO 2 mesoporous composite was prepared by the sol-gel method, working with 12-phosphomolybdic acid, TEOS and the triblock copolymer EO 20 PO 70 EO 20 (Pluronic P123) as a template [182]. Authors declared that in this compound, the HPMo was highly dispersed inside the silica framework, while maintaining its original Keggin structure.…”

Section: Phosphomolybdic Containing Pomsmentioning

confidence: 99%

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

2019

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Recalcitrant sulfur compounds are common impurities in crude oil. During combustion they produce SOx derivatives that are able to affect the atmospheric ozone layer, increasing the formation of acid rains, and reducing the life of the engine due to corrosion. In the last twenty years, many efforts have been devoted to develop conventional hydrodesulfurization (HDS) procedures, as well as alternative methods, such as selective adsorption, bio-desulfurization, oxidative desulfurization (ODS) under extractive conditions (ECODS), and others. Among them, the oxidative procedures have been usually accomplished by the use of toxic stoichiometric oxidants, namely potassium permanganate, sodium bromate and carboxylic and sulfonic peracids. As an alternative, increasing interest is devoted to selective and economical procedures based upon catalytic methods. Heterogeneous catalysis is of relevance in industrial ODS processes, since it reduces the leaching of active species and favors the recovery and reuse of the catalyst for successive transformations. The heterogenization of different types of high-valent metal transition-based organometallic complexes, able to promote the activation of stoichiometric benign oxidants like peroxides, can be achieved using various solid supports. Many successful cases have been frequently associated with the use of mesoporous silicas that have the advantage of easy surface modification by reaction with organosilanes, facilitating the immobilization of homogeneous catalysts. In this manuscript the application of SBA-15 as efficient support for different active metal species, able to promote the catalytic ODS of either model or real fuels is reviewed, highlighting its beneficial properties such as high surface area, narrow pore size distribution and tunable pore diameter dimensions. Related to this topic, the most relevant advances recently published, will be discussed and critically described.

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Synthesis and non‐parametric evaluation studies on high performance of catalytic oxidation‐extraction desulfurization of gasoline using the novel TBAPW₁₁Zn@TiO₂@PAni nanocomposite

Khorrami

Aghbolagh

2019

Applied Organom Chemis

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In this work, the new catalyst (assigned as TBAPW11Zn@TiO2@PAni) was successfully designed and synthesized on the basis of quaternary ammonium salt of zinc monosubstituted phosphotungstate [(n‐C4H9)4N][PW11ZnO39] (TBAPW11Zn), titanium dioxide (TiO2), and polyaniline (PAni). This study reports the catalytic oxidation‐extraction desulfurization (ECODS) of sulfur‐containing molecules from real and the simulated (Th, BT, and DBT) gasoline using new organic–inorganic hybrid catalyst (TBAPW11Zn@TiO2@PAni). The ECODS results were shown that the concentration of sulfur compounds (SCs) of real gasoline was lowered from 0.4992 to 0.0122 wt.% with 97% efficiency at 35 °C after 1 h. Furthermore, the synthesized heterogeneous nanocatalyst showed high stability and reusability after five times without significant loss of activity. The high performance of TBAPW11Zn@TiO2@PAni/H2O2/CH3CO2H system can be a promising route with a superb potential in the generation of ultra‐low‐sulfur gasoline. Also the Mann–Whitney U‐test results show that there is not a significant difference between the mean of sulfur percentage for DBT & BT, BT & Th and DBT & Th in the presence of the catalyst. Based on the Kruskal–Wallis test results, we can conclude that the temperature, time and amount of catalyst have a significant effect on ECODS efficiency of TBAPW11Zn@TiO2@PAni nanocomposite.

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Synthesis, characterization and catalytic properties of mesoporous HPMo/SiO2 composite

Cited by 8 publications

References 20 publications

Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

Synthesis and non‐parametric evaluation studies on high performance of catalytic oxidation‐extraction desulfurization of gasoline using the novel TBAPW₁₁Zn@TiO₂@PAni nanocomposite

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Synthesis, characterization and catalytic properties of mesoporous HPMo/SiO2 composite

Cited by 8 publications

References 20 publications

Synthesis and characterization of a new nanocomposite (FeW11V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Synthesis and characterization of a new nanocomposite (FeW11V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

SBA-15 Anchored Metal Containing Catalysts in the Oxidative Desulfurization Process

Synthesis and non‐parametric evaluation studies on high performance of catalytic oxidation‐extraction desulfurization of gasoline using the novel TBAPW11Zn@TiO2@PAni nanocomposite

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Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Synthesis and characterization of a new nanocomposite (FeW₁₁V@CTAB‐MMT) as an efficient heterogeneous catalyst for oxidative desulfurization of gasoline

Synthesis and non‐parametric evaluation studies on high performance of catalytic oxidation‐extraction desulfurization of gasoline using the novel TBAPW₁₁Zn@TiO₂@PAni nanocomposite