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

Abstract

A new organic-inorganic hybrid nanocomposite (TBA-Si 2 W 18 Mn 4 @SAB) was synthesized by supporting quaternary ammonium salt of sandwich-type polyoxometalate (TBA-Si 2 W 18 Mn 4 ) on sodium-activated bentonite (SAB) for catalysing an oxidative desulfurization (ODS) process. The synthesized materials were characterized by means of elemental analysis, 29 Si 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-Si 2 W 18 Mn 4 @SAB as catalyst and CH 3 COOH/H 2 O 2 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-Si 2 W 18 Mn 4 @SAB catalyst was found to be reusable for five times. The obtained data illustrated that the use of the TBA-Si 2 W 18 Mn 4 @SAB/ CH 3 COOH/H 2 O 2 oxidation system could be a convenient strategy for reducing the sulfur content of gasoline fuel under moderate reaction conditions.

Synthesis of new nanocomposite based on nanoceramic and mono substituted polyoxometalate, PMo11Cd@MnFe2O4, with superior catalytic activity for oxidative desulfurization of real fuel

“…[1] Hence, to overcome these troubles, some approaches are considered, like setting limits for sulfur compounds (<10 ppm) in oil treatments. [2] For many years the hydrodesulfurization process was used to eliminating sulfur compounds. This process performs in high temperature and pressure conditions (300-400 C and 30-130 atm) and also using hydrogen will cost additional expenses as well.…”

“…[3] Furthermore, thiols and disulfides could eliminate easily, but heterocyclic compounds like dibenzothiophene remain unaltered. [2] According to these incapabilities and harsh conditions, scientists have developed new alternative routes for desulfurization processes. Namely, catalytic oxidative desulfurization (CODS), [4] biodesulfurization, [5] adsorption [6] and extraction.…”

Facile synthesis of inorganic–organic Fe2W18Fe4@NiO@CTS hybrid nanocatalyst induced efficient performance in oxidative desulfurization of real fuel

“…The sulfur oxides (SO x ) gases are released into the atmosphere by combustion of hydrocarbon fuels‐containing sulfur compounds . These gases react with water vapor in the atmosphere and convert to acid rain, which causes acidification of the soil, and ultimately leads to the destruction of forest and other types of ecosystem damages . So, production of transportation fuel with substantially lowered sulfur content has become a global challenge over the last year .…”

Synthesis and Characterization of New Inorganic‐Organic Hybrid Nanocomposite PMo11Cu@MgCu2O4@CS as an Efficient Heterogeneous Nanocatalyst for ODS of Real Fuel

“…Among these processes, the ODS has gained attention from the scientific community worldwide due to mild reaction conditions such as lower reaction temperature and atmospheric pressure, lower investment, operating costs, and simpler process . During the last few decades, the application of ODS method for removal of OSCs from liquid fuels has been confirmed to be very promising . Various types of catalysts for ODS have been reported in previous publications .…”