New mesoporous catalysts with Brønsted acid sites for deep oxidative desulfurization of model fuels

Polikarpova, P. D.; Akopyan, A. V.; Shlenova, Anna; Анисимов, А. В.

doi:10.1016/j.catcom.2020.106123

Cited by 32 publications

(22 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect is related to an increase in the decomposition rate of hydrogen peroxide with increasing temperature, which leads to a decrease in the amount of persulfonic acid. In previous work, for a MCM-based catalyst, the same results were obtained at a higher temperature of 80 °C. This fact can be connected with the adsorption of oxidation productscorresponding sulfoneon supports via hydrogen bonds with hydroxyl groups of mesoporous silicate MCM-41.…”

Section: Resultssupporting

confidence: 70%

“…The choice of the first path leads to an increase in the number of catalyst synthesis stages and higher cost and does not always guarantee the absence of leaching of metals. Previously, we had shown that MCM-41-containing sulfonic groups can be used as a catalyst for the oxidation of the model compound dibenzothiophene (DBT) . However, the application of silica-based polar catalysts is connected with the fast catalyst deactivation due to the adsorption of polar oxidation productssulfones in catalyst pores via hydrogen bond formation with silanol groups.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metal-Free Oxidative Desulfurization Catalysts Based on Porous Aromatic Frameworks

Akopyan

Куликов

Polikarpova

et al. 2021

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

Porous aromatic frameworks modified by sulfonic groups were synthesized and, for the first time, applied for the oxidative desulfurization of a model and a real fuel. The main factors affecting the process including the catalyst dosage, temperature, reaction time, oxidant dosage, and hydrogen peroxide concentration were investigated in detail. Under optimal conditions, dibenzothiophene (DBT) was removed completely. It was shown that the synthesized catalysts reduced the sulfur content in the straight-run gasoline fraction up to ultra-low values (7 ppm). Fuel fractions and their oxidation products were analyzed by two-dimensional gas chromatography with time-of-flight mass spectrometry detection. No byproducts of hydrocarbon oxidation were found, which confirms the high selectivity of oxidation in the presence of synthesized catalysts. These catalysts retain their activity in DBT oxidation for at least five cycles.

show abstract

Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Metal-Free Oxidative Desulfurization Catalysts Based on Porous Aromatic Frameworks

Akopyan

Куликов

Polikarpova

et al. 2021

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similarly, combining organic and inorganic catalysts for ODS reactions can enhance the efficiency of the process as a result of the synergy in the desulfurization properties of both materials. Typically, Polikarpova and his co-workers immobilized sulfonic groups on MCM-41 via a chemical bond, forming MCM–SO 3 H . The sulfur atom in the sulfonic group is coordinated by the Brønsted acid center, as depicted in Figure a.…”

Section: Metal-free Catalytic Odsmentioning

confidence: 99%

“…(a) Mechanism of ODS using MCM–SO 3 H and (b) ODS mechanism using supported IL. This figure was reprinted with permission from ref .…”

Section: Metal-free Catalytic Odsmentioning

confidence: 99%

Metal-Free Catalytic Oxidative Desulfurization of Fuels─A Review

Tanimu

Ganiyu

et al. 2022

Energy Fuels

View full text Add to dashboard Cite

Overdependence of energy consumption around fossil fuels is threatening our environment from different anthropogenic emissions of pollutants. These pollutants (CO x , NO x , and SO x ) resulting from combustion activities of crude oil and petroleum products are life-threatening. Desulfurization of fuels is an important matter that constantly requires attention from the relevant stakeholders for environmental, economic, and social benefits. Hydrodesulfurization required to lower the sulfur content in the crude oil comes at high operating conditions and cost, especially toward achieving ultradeep desulfurization of <10 or 0 ppm as required for fuel cell catalytic converters. In the recent decades, oxidative desulfurization (ODS) is gaining fast interest among the few alternatives proposed as a complementary approach. This paper reviews the current advances in the metal-free catalytic ODS owing to the effectiveness and promising results in the light of safety, cost, and environmental concerns compared to conventional metal-containing catalytic ODS strategies. Special contributions related to graphitic materials, nitrides, carbides, ionic liquids, deep eutectic solvents, and porous organic polymers with respect to the broad classification of organic, inorganic, and hybrid (organic–inorganic) metal-free catalysts and their mechanism of catalyzing the oxidation process are thoroughly reviewed. The challenges, improvements, merits, and future prospects are discussed in the context of industrial feasibility for strategic plans and further studies.

show abstract

“…In addition to Pluronic F127, several synthetic templates such as Pluronic P123, CTAB, and CTAOH can control porosity based on their molecular weight, chain length and functional groups 19 , 25 , 26 . These synthetic pore templates have succeeded in producing porous materials such as MCM-41, MCM-48, SBA-15 and KIT 2 , 27 – 29 .…”

Section: Introductionmentioning

confidence: 99%

The effect of gelatin as pore expander in green synthesis mesoporous silica for methylene blue adsorption

Ulfa

Prasetyoko

Trisunaryanti

et al. 2022

Sci Rep

View full text Add to dashboard Cite

Mesoporous silica NSG had been synthesized while employing gelatin as a natural template to successfully increase the particle size and expand the pore diameter of NSG. All silica samples exhibited a similar XRD pattern with a broad peak centred at 2θ = 22.9°, as the characteristic of amorphous silica. FTIR results showed that the reduction of Si–O–Si symmetric stretching vibrations at 1075 cm−1 was due to the use of a high percentage of gelatin. Moreover, TEM analysis displayed the mesoporous channels in the form of a honeycomb structure with a diameter of ± 6 nm. Gelatin enhanced the surface area of silica from 467 to 510 m2/g, the pore volume from 0.64 to 0.72 cc/g and expanded the pore diameter from 3.5 nm to 6.0 nm. The expansion of the ordered mesopores with the increase of P123: gelatin ratios was elucidated by the pore size distribution. The adsorption capacity of methylene blue (MB) was improved on mesoporous silica with an expanded pore dimension to give 168 mg/g adsorption capacity within 70 min.

show abstract

New mesoporous catalysts with Brønsted acid sites for deep oxidative desulfurization of model fuels

Cited by 32 publications

References 34 publications

Metal-Free Oxidative Desulfurization Catalysts Based on Porous Aromatic Frameworks

Metal-Free Oxidative Desulfurization Catalysts Based on Porous Aromatic Frameworks

Metal-Free Catalytic Oxidative Desulfurization of Fuels─A Review

The effect of gelatin as pore expander in green synthesis mesoporous silica for methylene blue adsorption

Contact Info

Product

Resources

About