Synthesis of Organic−Inorganic Hybrid Nanocomposite Polyoxometalate/Metal Oxide/CS Polymer (PMnW<sub>11</sub>@TiO<sub>2</sub>@CS): Nanocatalyst for Oxidative Desulfurization of Real Fuel

Hadi

2021

Applied Organom Chemis

Self Cite

In the view of practical applications, synthesizing green and recyclable nanocatalysts under mild conditions were always been desired by scientists and industries. In this study, in order to obtain the clean gasoline, a novel nanocomposite (PMo12O40@MnFe2O40) based on polyoxometalate and ceramic was synthesized successfully with Aloe vera leaf extract by sol–gel method in extremely mild conditions. PMo12O40@MnFe2O40 is proposed as a green new recyclable and economic nanocatalyst for deep catalytic oxidative desulfurization (CODS) of real and model fuel (DBT, Th, and BT). The characterizations were carried out by different analysis methods including Fourier transform infrared (FT‐IR), X‐ray diffraction (XRD), scanning electron microscopy (SEM), and energy‐dispersive X‐ray spectroscopy (EDX), and the successful synthesis and immobilization were approved. After conducting the PMo12O40@MnFe2O4 in the CODS processes, optimum effective properties were investigated. The average efficiency of the nanocatalyst was found 98% for DBT and 96% for real fuel by optimum values of the properties (catalyst dosage, temperature, oxidation system, and different types of catalysts), not to mention its great ability in reusability with 96% of effectiveness after five runs. Moreover, the CODS mechanism is proposed, and based on the obtained results, the kinetics were in agreement with the pseudo‐first‐order model. Based on the obtained incomparable results, it could be considered as an effective, industrial‐scale, and green nanocatalyst for the desulfurization of refractory sulfur compounds in extremely mild conditions.

Section: Resultsmentioning

confidence: 99%

Synthesis of new nanocomposite based on ceramic and heteropolymolybdate using leaf extract of Aloe vera as a high‐performance nanocatalyst to desulfurization of real fuel

Hadi

2021

Applied Organom Chemis

Self Cite

“…The NiO particles are considered perspective due to the high specific surface, zero environmental toxicity, and availability; they are an inexpensive semiconductive material [51,56]. The advantages of TiO 2 are its non-toxicity, as well as high thermal and chemical stability [52].…”

Section: Components For the Formation Of Nanostructured Catalysts Oxidants And Extractants For Oxidative Desulfurization Of Liquid Fuelsmentioning

confidence: 99%

“…According to the published data, the duration of the oxidation stage does not exceed 3-6 h, and is usually within the 10-60 min range [87][88][89]. The data for the following NCs and supports are summarized in Table 1 [51], Mn(II)-substituted heteropolyacids with Keggin-type-structured polyoxometalate (PMnW 11 ), titanium dioxide (TiO 2 ) and chitosan [52], CTAB-PTA@CS nanocatalyst based on cetyltrimethylammonium bromide (CTAB), phosphotungstic acid (PTA), and chitosan [49]. These NCs ensured the removal of 97% of sulfur from gasoline within 1-2 h at 35-60 • C with the initial sulfur content of~500 ppm [52].…”

Section: Components For the Formation Of Nanostructured Catalysts Oxidants And Extractants For Oxidative Desulfurization Of Liquid Fuelsmentioning

confidence: 99%

“…Many NCs can be successfully separated from the reaction medium upon the completion of oxidation and extraction of the oxidized forms of sulfur, and can therefore be used for at least 3-5 cycles. This is an indisputably important feature when the perspectives of industrial application are considered [43,51,52,56,61,64,65]. For example, after the processes, the NCs can be separated with a simple filtration method, washed with ethanol or water and reused for several new runs [25].…”

Section: Components For the Formation Of Nanostructured Catalysts Oxidants And Extractants For Oxidative Desulfurization Of Liquid Fuelsmentioning

confidence: 99%

See 1 more Smart Citation

Nanocatalysts for Oxidative Desulfurization of Liquid Fuel: Modern Solutions and the Perspectives of Application in Hybrid Chemical-Biocatalytic Processes

et al. 2021

In this paper, the current advantages and disadvantages of using metal-containing nanocatalysts (NCs) for deep chemical oxidative desulfurization (ODS) of liquid fuels are reviewed. A similar analysis is performed for the oxidative biodesulfurization of oil along the 4S-pathway, catalyzed by various aerobic bacterial cells of microorganisms. The preferences of using NCs for the oxidation of organic sulfur-containing compounds in various oil fractions seem obvious. The text discusses the development of new chemical and biocatalytic approaches to ODS, including the use of both heterogeneous NCs and anaerobic microbial biocatalysts that catalyze the reduction of chemically oxidized sulfur-containing compounds in the framework of methanogenesis. The addition of anaerobic biocatalytic stages to the ODS of liquid fuel based on NCs leads to the emergence of hybrid technologies that improve both the environmental characteristics and the economic efficiency of the overall process. The bioconversion of sulfur-containing extracts from fuels with accompanying hydrocarbon residues into biogas containing valuable components for the implementation of C-1 green chemistry processes, such as CH4, CO2, or H2, looks attractive for the implementation of such a hybrid process.

“…solvents such as N, N‐dimethylformamide (DMF), acetonitrile, methanol ,[10] and dimethylsulfoxide. (DMSO) [3b] have shown high efficiency in separating the oxidized sulfur compounds from the hydrocarbon phase.Today, many studies have been done on the oxidative desulfurization process with different catalysts including organic acids, [11,12] ionic liquids, [13,14,3c] polyoxometalates, [15,6d,16a] and solid catalysts [9b,16b] . The ultrasound‐assisted oxidative desulfurization (UAOD) is a novel technique exhibiting several advantages compared to HDS.…”

Section: Introductionmentioning

confidence: 99%

LaMn_xCo_1‐xO₃ (x=0, 0.25) Perovskites: Novel Nano Catalysts for Removal of Thiophene compounds in Fuels by Catalytic and Ultrasound‐assisted Oxidative Desulfurization

Esmaili

Hosseini

2023

ChemistrySelect

LaMnxCo1‐xO3 (x=0, 0.25) perovskites were developed as novel nanocatalysts for the desulfurization of thiophenes compounds by catalytic oxidative desulfurization (CODS) and ultrasound‐assisted oxidative desulfurization (UAOD). The perovskites were synthesized by the sol‐gel auto‐combustion method and characterized by X‐ray diffraction (XRD), temperature programmed reduction (TPR), Scanning electron microscopy (SEM) and BET surface area. The experiments were designed by the Box‐Behnken method of response surface methodology. The catalytic experiments were designed by response surface methodology (RSM). LaMn0.25Co0.75O3 despite having a lower surface area rather than LaCoO3 exhibited superior activity due to easy reducibility and high surface electron density approved by TPR. Pareto analysis indicated that the DBT concentration had the most effect on the CODS process. Ultrasound waves enhanced the activity of the catalysts via the formation of hot spots as an accelerating and de‐agglomerating agent in the UAOD process, leading the LaMn0.25Co0.75O3 to be reusable at least for 5 cycles. A mechanism for DBT oxidation was proposed by the formation of DBT sulfone. Due to steric hindrance and the electron density of the sulfur atoms in thiophene derivatives, the following order resulted in their desulfurization rate: DBT>4‐MDBT>BT. The study indicated that perovskites could be novel and promising nanocatalysts for the desulfurization of fuels.