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

Abstract

In this work, a new nanocomposite (PMo11Cu@MgCu2O4@CS) was synthesized by reaction of copperII‐monosubstituted phosphomolybdate (PMo11Cu), magnesiocopperite (MgCu2O4) and Chitosan (CS) via the sol‐gel method. The assembled nanocomposite was characterized by FTIR, XRD, SEM. The catalytic activity of the nanocomposite was tested on oxidative desulfurization (ODS) of real gasoline in the presence of CH3COOH/H2O2 in the volume ratio of 1/2 as an oxidant. Additionally, the results were compared with the oxidation reaction of prepared model sulfur compounds at the same conditions. The ODS results showed that immobilized of PMo11Cu on the CS and MgCu2O4 nanoceramic increased the efficiency and activity of the PMo11Cu in the removal of organic sulfur compounds (OSCs). The PMo11Cu@CS @MgCu2O4 could be reused for at least five times without notable reduction in efficiency of ODS system. This investigation presents a promising approach to the efficient removal of OSCs from gasoline using PMo11Cu@MgCu2O4@CS catalyst under mild 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

“…The CODS process performs in mild conditions and inexpensive costs in comparison to the other methods. [8] Therefore, an oxidant is needed to oxidize the sulfur compounds into their corresponding sulfone and sulfoxide species. By increasing the polarity and molecular mass of these species, the separation will be possible either by extraction or adsorption.…”

Synthesis and characterization of new organic–inorganic nanohybrid film (TBA)PWFe/PVA/CTS as an efficient and reusable amphiphilic catalyst for ODS of real fuel

“…In ultraviolet light regions, the spectrum of (TBA)PWFe demonstrates unique adsorption peaks around 190–210 and 240 nm (Figure (a)). The peaks around the wavelengths of 190–210 nm can be assigned to πp‐πd electronic transitions of terminal W=O d. The broad absorption band at 240 nm is attributed to the ligand‐to‐metal charge transfer (LMCT) transition of O b/c 2− → W 6+ , respectively . In contrast, for (TBA)PWFe/PVA/CTS nanohybrid, the band at 240 nm was noticeably shifted to 221 nm (Figure (b)).…”

“…Initially, H 2 O 2 reacts with acetic acid to form peracetic acid and water molecules. For the activation of the catalyst, the oxygen can be transferred from peracetic acid to terminal metal‐oxygen groups (W=O d ) of [PW 11 Fe(H 2 O)O 39 ] 4− anion . At this time, the new oxoperoxo species mediate (WO 2 ) are generated in the reaction media.…”

“…Thus, the reaction products can be removed from the fuel by polar extraction solvents or adsorbents . Several oxidants have been proposed such as H 2 O 2, O 2, O 3, NO 2, K 2 FeO 4, and tert ‐butyl hydroperoxide . Among them, H 2 O 2 has become a widely used oxidant due to it does not pollute the environment, and the only by‐product is water .…”

“…The oxidation reactions using H 2 O 2 usually involved two or three phases, which inhibited the rate of oxidative desulfurization. For overcoming this obstacle, the oxygen‐containing chemicals are produced through the composition of H 2 O 2 with organic acids and amphiphilic catalysts …”