Green and efficient organic–inorganic hybrid nanocatalyst for oxidative desulfurization of gasoline

• Published in: Applied organometallic chemistry Vol. 32; no. 12
• Main Authors: Rezvani, Mohammad Ali, Aghbolagh, Zahra Shokri, Monfared, Hassan Hosseini
• Format: Journal Article
• Language: English
• Published: Chichester Wiley Subscription Services, Inc 01-12-2018
• Subjects: Bentonite; Catalysis; Catalysts; Catalytic oxidation; Chemical synthesis; Chemistry; Desulfurizing; Fourier transforms; Gasoline; heterogeneous catalyst; Hydrogen peroxide; Infrared analysis; nanocomposite; Nanocomposites; NMR; Nuclear magnetic resonance; Organosulfur compounds; Oxidation; oxidative desulfurization; Oxidizing agents; Quaternary ammonium salts; Reaction time; sandwich‐type silicotungstate; Scanning electron microscopy; sodium‐activated bentonite; Sulfur; Sulfur content; Sulfur removal; X ray spectra; X-ray diffraction
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.4592

A new organic–inorganic hybrid nanocomposite (TBA‐Si2W18Mn4@SAB) was synthesized by supporting quaternary ammonium salt of sandwich‐type polyoxometalate (TBA‐Si2W18Mn4) on sodium‐activated bentonite (SAB) for catalysing an oxidative desulfurization (ODS) process. The synthesized materials were characterized by means of elemental analysis, 29Si NMR, Fourier transform infrared and UV–visible spectroscopies, X‐ray diffraction and scanning electron microscopy. The proposed ODS process was successfully developed on the basis of the catalytic oxidation of organosulfur compounds using TBA‐Si2W18Mn4@SAB as catalyst and CH3COOH/H2O2 as oxidizing agent. The removal of the sulfur content of gasoline reached 97% at a temperature of 35°C after 1 h using 0.10 g of the prepared catalyst. Various experiments were conducted to investigate the effects of reaction time, catalyst amount, reaction temperature and catalyst type on sulfur removal efficiency. The heterogeneous TBA‐Si2W18Mn4@SAB catalyst was found to be reusable for five times. The obtained data illustrated that the use of the TBA‐Si2W18Mn4@SAB/CH3COOH/H2O2 oxidation system could be a convenient strategy for reducing the sulfur content of gasoline fuel under moderate reaction conditions.
A new organic–inorganic hybrid nanocomposite (TBA‐Si2W18Mn4@SAB) was synthesized by supporting quaternary ammonium salt of sandwich‐type polyoxometalate (TBA‐Si2W18Mn4) on sodium‐activated bentonite (SAB) for catalysing an oxidative desulfurization (ODS) process. The removal of the sulfur content of gasoline reached 97% at a temperature of 35°C after 1 h using 0.10 g of the prepared catalyst. The use of the TBA‐Si2W18Mn4@SAB/CH3COOH/H2O2 oxidation system could be a convenient strategy for reducing the sulfur content of gasoline fuel under moderate reaction conditions.