Highly efficient oxidative desulfurization catalyzed by copper-based materials using hydrogen peroxide as oxidant

Ahmadian, Moslem; Anbia, Mansoor

doi:10.1016/j.fuel.2022.124471

Cited by 22 publications

(2 citation statements)

References 62 publications

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“…In recent decades, due to increasingly stringent environmental regulations, the desulfurization of liquid fuel has become inevitable to achieve environmentally friendly fuels. Hence, the production of clean fuel oils with low sulfur content ( S ≤ 10 ppm) has been widely explored. − Different technologies, including hydrodesulfurization (HDS), biological desulfurization, extractive desulfurization (EDS), oxidative desulfurization (ODS), and adsorptive desulfurization have been developed to remove the sulfur compounds from fuel oils. HDS is the conventional chemical process employed to remove various sulfur compounds during the deep desulfurization of liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Ahmadian,

Anbia

2023

Energy Fuels

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Phosphorus slag (P-slag) as a cost-effective source is used for the extraction of mesoporous silica SiO 2 . The composite materials of the Keggin-type heteropolyanions (HPAs) were anchored on SiO 2 and successfully prepared via an impregnation approach. Various approaches including X-ray diffraction, Brunauer−Emmett−Teller, inductively coupled plasma, field emission scanning electron microscopy-energy dispersive spectrum, ultraviolet−visible, temperature-programmed desorption, Fourier transform infrared, and transmission electron microscopy were employed to characterize the samples. HPAs supported on SiO 2 were employed for the oxidation of organic sulfur compounds [e.g., benzothiophene (BT), dibenzothiophene (DBT), and 4,6dimethyldibenzothiophene (4,6-DMDBT)] from the model fuel. HPA-loaded SiO 2 catalysts illustrated outstanding catalytic activity in the oxidative desulfurization procedure. The removal performance of the DBT using Cs 2 W 9 V 3 /SiO 2 was greater than that using other materials under the optimum condition. The maximum level of DBT removal by Cs 2 W 9 V 3 /SiO 2 reached 100%. The removal performance of various substrates followed the order DBT > 4,6-DMDBT > BT. The Cs 2 W 9 V 3 -incorporated SiO 2 catalyst illustrated brilliant reusability five times with negligible reduction in performance. Besides, the kinetic studies exhibited that the desulfurization procedure on DBT-containing sulfur compound verified a pseudo-first-order kinetic model. The Arrhenius activation energy for the Cs 2 W 9 V 3 /SiO 2 catalyst obtained 47.2 kJ/mol.

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Section: Introductionmentioning

confidence: 99%

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Ahmadian,

Anbia

2023

Energy Fuels

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“…A suitable catalyst is required to increase the efficiency and activity of the ODS process because the interaction between the active sites of the catalyst and the oxidant generates active radical species that contribute to high performance . A wide range of transition metal oxides like copper (Ahmadian & Anbia, 2022), titanium (Fraile et al, 2016), chromium (Jiang et al, 2022), tungsten (Shen et al, 2018), iron (Al-Abduly & Sharma, 2014), molybdenum (Chen et al, 2018), cobalt (Bhadra & Jhung, 2022) and vanadium (Caero et al, 2005) oxides used as catalytically active phases in oxidative desulfurization process. The SnO2 and MoO3 catalysts are widely examined in systems of oxidative reactions.…”

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Tin molybdenum mixed metal oxides catalyst for oxidative desulfurization of model diesel

Lesafi

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This study reports on synthesis, characterization, and catalytic activity of mesoporous mixed metal oxides of tin (Sn) and molybdenum (Mo) for sulfur removal from model diesel. Variable synthesis conditions, namely calcination temperature and Sn/Mo mole ratios, have been on focus. Several techniques were used to characterize the catalysts, including powder X-ray diffraction (XRD) for the crystal structure, orientation, and particle size; scanning electron microscopy (SEM)-EDX for examining the morphological properties of the materials, N2 adsorption-desorption isotherms for textural properties, thermal gravimetric analysis (TGA) for thermal stability, the Fourier transform infrared spectroscopy (FT-IR) for functionality. Characterization results show that the adsorption-desorption isotherms are of type IV, indicative of mesoporous materials. The surface area of the synthesized materials decreased as calcination temperature increased due to the Ostwald ripening process and increased with the mole ratio Sn/Mo increase. The X-ray diffraction structural analyses revealed that the synthesized catalyst had a tetragonal structure. The presence of Mo=O and Sn‒O‒Mo bonds, which are responsible for the catalytic reaction, is confirmed by FT-IR and Raman analyses. The activity of the catalysts prepared at various calcination temperatures and mole ratios was analyzed for oxidative desulfurization of model diesel, dibenzothiophene (DBT). The optimal synthesis conditions were the calcination temperature of 450 °C and the mole ratio of Sn/Mo of (2:1). Other multiple parameters affecting the reduction of sulfur compounds were also investigated, including reaction temperature, catalyst loading, oxidant/sulfur ratio, and reaction time. The (DBT) removal efficiency was 99.8 % at 60 °C, 100 mg, 5, and 30 min, correspondingly. This high catalytic activity was due to the surface defects increase,resulting in a high surface area with high pore distribution around the mesopore region. Experiments examining the reaction kinetics have indicated that the reaction follows a pseudo first-order behaviour. The activation energy for the reaction has been determined to be 36 ± 4 kJ mol-1 . The rate of the heterogeneous reaction is governed by the Langmuir-Hinshelwood mechanism. Furthermore, the maximum rate constant value of SnO2-MoO3 catalyst with Sn/Mo (2:1) molar ratio is 0.057 min−1, which is higher than for pure SnO2 (0.017 min‒1 ) and MoO3 (0.007 min−1 ), confirming a synergy between SnO2 and MoO3, promoting oxidative desulfurization efficiency. The catalyst's high activity and reusability indicate enormous promise for industrial catalytic desulfurization.

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Catalytic aerobic desulfurization of fuels in the presence of nanosized mixed carbide FeWC

Akopyan

Eseva

Mnatsakanyan

et al. 2023

Chemical Engineering Journal

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Highly efficient oxidative desulfurization catalyzed by copper-based materials using hydrogen peroxide as oxidant

Cited by 22 publications

References 62 publications

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Tin molybdenum mixed metal oxides catalyst for oxidative desulfurization of model diesel

Catalytic aerobic desulfurization of fuels in the presence of nanosized mixed carbide FeWC

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Highly efficient oxidative desulfurization catalyzed by copper-based materials using hydrogen peroxide as oxidant

Cited by 22 publications

References 62 publications

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO2: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO2: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Tin molybdenum mixed metal oxides catalyst for oxidative desulfurization of model diesel

Catalytic aerobic desulfurization of fuels in the presence of nanosized mixed carbide FeWC

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Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity

Keggin-Type Heteropolyanions Immobilized on Phosphorus Slag Derived SiO₂: Synthesis, Characterization, and Their Catalytic Oxidative Desulfurization Activity