Ionic liquids for the removal of sulfur and nitrogen compounds in fuels: a review

Paucar, N. Evelin; Kiggins, Peyton; Blad, Bryson; Jesus, Karl De; Afrin, Farjana; Pashikanti, Srinath; Sharma, Kavita

doi:10.1007/s10311-020-01135-1

Cited by 53 publications

(32 citation statements)

References 148 publications

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“…However, since an increasing part of the produced crude oil is of the heavy variety, there is a significant increase in the content of condensed thiophene derivatives, for which the hydrodesulfurization technology becomes ineffective, especially for dibenzothiophene (DBT) and its alkyl derivatives. , To increase the rate of hydrogenolysis of heteroaromatic compounds, the parameters of the process are tightened, including an increase in temperature and pressure in conjunction with the supply of excess hydrogen. This approach makes the hydrotreating technology unprofitable; therefore, special attention is paid to the development of alternative hydrogen-free desulfurization methods, including adsorptive desulfurization, , extraction desulfurization, , biodesulfurization, , and oxidative desulfurization. , The latter technique is considered the most promising one, because it can effectively cope with difficult sulfur compounds under relatively mild conditions (temperatures up to 150 °C, atmospheric pressure). This method is based on the oxidation of organosulfur compounds in the presence of an oxidizing agent and a catalyst to the corresponding sulfoxides and sulfones, followed by the removal of the polar products by simple adsorption or extraction methods.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 To increase the rate of hydrogenolysis of heteroaromatic compounds, the parameters of the process are tightened, including an increase in temperature and pressure in conjunction with the supply of excess hydrogen. This approach makes the hydrotreating technology unprofitable; therefore, special attention is paid to the development of alternative hydrogen-free desulfurization methods, including adsorptive desulfurization, 8,9 extraction desulfurization, 10,11 biodesulfurization, 12,13 and oxidative desulfurization. 14,15 The latter technique is considered the most promising one, because it can effectively cope with difficult sulfur compounds under relatively mild conditions (temperatures up to 150 °C, atmospheric pressure).…”

Section: Introductionmentioning

confidence: 99%

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Heterogeneous Catalysts Containing an Anderson-Type Polyoxometalate for the Aerobic Oxidation of Sulfur-Containing Compounds

Eseva

Lukashov

Cherednichenko

et al. 2021

Ind. Eng. Chem. Res.

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New highly efficient heterogeneous catalysts based on an immobilized Anderson-type polyoxometalate supported on the functionalized SBA-15 surface have been successfully synthesized and characterized by FT-IR, XRD, N 2 adsorption−desorption isotherms, BET, SEM, TEM, EDX, and XPS analyses. The catalytic activity was investigated in the aerobic oxidative desulfurization of a model fuel. Heterogeneous catalysts were synthesized by various methods of immobilization using organic fragments of different natures. An efficient method of immobilization based on the grafting of N-methylimidazole as a cation-forming agent has been shown. The effect of temperature, dosage, and active phase loading on the conversion of dibenzothiophene (DBT) was studied. The highest activity was shown by the CoMo-0.5IL-SBA catalyst (IL = 1-methyl-3-(trimethoxysilylpropyl)-imidazolium cation), in the presence of which 100% DBT removal is achieved within 90 min at 120 °C at a catalyst amount of 0.2 wt %. Moreover, the immobilized catalyst could be recycled 5 times without a significant loss of catalytic activity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heterogeneous Catalysts Containing an Anderson-Type Polyoxometalate for the Aerobic Oxidation of Sulfur-Containing Compounds

Eseva

Lukashov

Cherednichenko

et al. 2021

Ind. Eng. Chem. Res.

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“…The standard industrial methods for the removal of sulfur and nitrogen-based compounds from crude oils are hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) [9,10]. HDS is an effective process that needs high temperature (>350 • C) and pressure (up to 6 MPa), and also requires high amounts of hydrogen consumption [11][12][13]. SCs and NCs in fuels are converted to hydrogen sulfide and ammonia, respectively, via the catalytic reduction with H 2 [14] In the HDS process, NCs severely affect the catalyst and cause corrosion of the refinery equipment due to their high reactivity [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Removing Simultaneously Sulfur and Nitrogen from Fuel under a Sustainable Oxidative Catalytic System

Silva

Viana

Mirante

et al. 2021

Sustainable Chemistry

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An effective process to remove nitrogen-based compounds from fossil fuels without harming the process of sulfur removal is an actual gap in refineries. A success combination of desulfurization and denitrogenation processes capable of completely removing the most environmental contaminates in diesel under sustainable conditions was achieved in this work, applying polyoxometalates as catalysts, hydrogen peroxide as oxidant, and an immiscible ionic liquid as an extraction solvent. The developed process based in simultaneous oxidative desulfurization (ODS) and oxidative denitrogenation (ODN) involved initial extraction of sulfur and nitrogen compounds followed by catalytic oxidation. Keggin-type polyoxomolybdates revealed much higher reusing capacity than the related polyoxotungstate. Effectively, the first catalysts practically allowed complete sulfur and nitrogen removal only in 1 h of reaction and for ten consecutive cycles, maintaining the original catalyst and ionic liquid samples.

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“…Ionic liquids are used to extract S-and N-compounds either combined or selective. ILs were found to be far better option than classical desulfurization and denitrogenation agents due to their enhanced efficiency and selectivity [36]. Wang et al…”

Section: Crude Oil Industrymentioning

confidence: 99%

Ionic liquids as alternative solvents for energy conservation and environmental engineering

2021

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Because of industrialization and modernization, phenomenal changes have taken place in almost all spheres of life. Consequently, the consumption of energy resources and the cases of environmental hazards have risen to an unprecedentedly high level. A development model with due consideration to nature and an efficient utilization of energy sources has become the need of the hour, in order to ensure a sustainable balance between the environmental and technological needs. Recent studies have identified the suitability of ionic liquids (ILs), often labeled as ‘green solvents’, in the efficient utilization of energy resources and activities such as bio-extraction, pollution control, CO2 capture, waste management etc. in an environmentally friendly manner. The advent of magnetic ionic liquids (MILs) and deep eutectic solvents (DESs) have opened possibilities for a circular economic approach in this filed. This review intends to analyze the environmental and energy wise consumption of a wide variety of ionic liquids and their potential towards future.

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Ionic liquids for the removal of sulfur and nitrogen compounds in fuels: a review

Cited by 53 publications

References 148 publications

Heterogeneous Catalysts Containing an Anderson-Type Polyoxometalate for the Aerobic Oxidation of Sulfur-Containing Compounds

Heterogeneous Catalysts Containing an Anderson-Type Polyoxometalate for the Aerobic Oxidation of Sulfur-Containing Compounds

Removing Simultaneously Sulfur and Nitrogen from Fuel under a Sustainable Oxidative Catalytic System

Ionic liquids as alternative solvents for energy conservation and environmental engineering

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