Ionic Liquid-based Extraction of Sulfur Compounds From Gasoline as a Complementary Process to Oxidative Desulfurization

Nejad, N. Farzin; Shams, Esmaeil; Amini, Mohammad K.

doi:10.1080/10916466.2012.689794

Cited by 13 publications

(5 citation statements)

References 27 publications

(29 reference statements)

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“…Recently, the oxidative desulfurization (ODS) method in combination with IL extraction has been extensively investigated because of its moderate operation conditions and high sulfur removal efficiency. Moreover, using ILs as alternatives to volatile organic solvents in extractive desulfurization processes is proven to be effective due to their advantages, such as wide liquid range, nonflammability, and high thermal stability. − …”

Section: Introductionmentioning

confidence: 99%

Oxidative Desulfurization of Model Diesel Using Ionic Liquid 1-Octyl-3-methylimidazolium Hydrogen Sulfate: An Investigation of the Ultrasonic Irradiation Effect on Performance

et al. 2016

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A Brønsted acidic ionic liquid (IL), 1-octyl-3-methylimidazolium hydrogen sulfate ([Omim][HSO4]), was prepared and utilized as the extractant and catalyst to study the oxidative desulfurization of dibenzothiophene (DBT) in n-decane as the model oil. The effects of the alkyl chain length of the IL cation, temperature, H2O2/DBT molar ratio (O/S), IL/oil mass ratio, initial S-content, and sulfur species on the sulfur removal of the model oil were investigated. Complete removal of DBT was observed by [Omim][HSO4], O/S molar ratio of 5, and IL/oil mass ratio of 1:2 after 70 min at 25 °C. The order of observed oxidizing reactivity for different sulfur species was as follows: DBT > benzothiophene (BT) > thiophene (TH) > 4,6-dimethyldibenzothiophene (4,6-DMDBT). The IL could be reused six times without a significant decrease in the desulfurization activity. The kinetics of oxidative desulfurization for DBT by [Omim][HSO4] was found to be pseudo-first-order with an apparent rate constant of 0.0734 min–1 (at 298 K) and the apparent activation energy of 24.51 kJ/mol. The ultrasound-assisted oxidative desulfurization (UAOD) process was also applied and represented a high desulfurization performance for the model oil in a fast reaction. The effects of various parameters, including irradiation time, settling time, O/S molar ratio, and IL/model oil mass ratio, on the UAOD process were studied. The complete sulfur removal efficiency could be reached after 3 min of ultrasonic irradiation with an ultrasonic power of 30 W, ultrasonic frequency of 20 kHz, O/S molar ratio of 5, and IL/oil mass ratio of 1:2. It was observed that the application of ultrasonic irradiation allows the desulfurization process to be performed in a shorter time. The sulfur removal of real diesel was 77.2% in the ODS process, and 76.3% in the UAOD process under the optimal conditions.

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Section: Introductionmentioning

confidence: 99%

Oxidative Desulfurization of Model Diesel Using Ionic Liquid 1-Octyl-3-methylimidazolium Hydrogen Sulfate: An Investigation of the Ultrasonic Irradiation Effect on Performance

et al. 2016

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“…Fenton-like reagents, vanadium-based, rhenium-based, and several nonmetal compounds were proved efficient for deep desulfurization using ILs as extractants or reaction media. − The recent works on extraction and oxidative desulfurization are summarized in Table . For more details, please see Table S4 in the Supporting Information.…”

Section: Oxidation Of Sulfidesmentioning

confidence: 99%

Ionic Liquids in Selective Oxidation: Catalysts and Solvents

et al. 2017

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Selective oxidation has an important role in environmental and green chemistry (e.g., oxidative desulfurization of fuels and oxidative removal of mercury) as well as chemicals and intermediates chemistry to obtain high-value-added special products (e.g., organic sulfoxides and sulfones, aldehydes, ketones, carboxylic acids, epoxides, esters, and lactones). Due to their unique physical properties such as the nonvolatility, thermal stability, nonexplosion, high polarity, and temperature-dependent miscibility with water, ionic liquids (ILs) have attracted considerable attention as reaction solvents and media for selective oxidations and are considered as green alternatives to volatile organic solvents. Moreover, for easy separation and recyclable utilization, IL catalysts have attracted unprecedented attention as "biphasic catalyst" or "immobilized catalyst" by immobilizing metal- or nonmetal-containing ILs onto mineral or polymer supports to combine the unique properties of ILs (chemical and thermal stability, capacity for extraction of polar substrates and reaction products) with the extended surface of the supports. This review highlights the most recent outcomes on ILs in several important typical oxidation reactions. The contents are arranged in the series of oxidation of sulfides, oxidation of alcohols, epoxidation of alkenes, Baeyer-Villiger oxidation reaction, oxidation of alkanes, and oxidation of other compounds step by step involving ILs as solvents, catalysts, reagents, or their combinations.

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“…In this case, this polar solvent presents a double functionality of receiving the organosulfur compounds from the fuel phase and promoting a suitable medium for efficient oxidative catalysis. [28][29][30][31][32] The strategic combination of a highly efficient catalyst and a sustainable extraction medium is needed to achieve deep desulfurization in a short period of time. Hydrogen peroxide has been demonstrated to be an effective oxidant for oxidative desulfurization processes that are catalyzed by polyoxometalates and are considered to produce no harmful by-products.…”

Section: Introductionmentioning

confidence: 99%

Peroxomolybdate@MOFs as effective catalysts for oxidative desulfurization of fuels: correlation between MOF structure and catalytic activity

Balula

Granadeiro

Cunha-Silva

et al. 2023

Catal. Sci. Technol.

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Ionic Liquid-based Extraction of Sulfur Compounds From Gasoline as a Complementary Process to Oxidative Desulfurization

Cited by 13 publications

References 27 publications

Oxidative Desulfurization of Model Diesel Using Ionic Liquid 1-Octyl-3-methylimidazolium Hydrogen Sulfate: An Investigation of the Ultrasonic Irradiation Effect on Performance

Oxidative Desulfurization of Model Diesel Using Ionic Liquid 1-Octyl-3-methylimidazolium Hydrogen Sulfate: An Investigation of the Ultrasonic Irradiation Effect on Performance

Ionic Liquids in Selective Oxidation: Catalysts and Solvents

Peroxomolybdate@MOFs as effective catalysts for oxidative desulfurization of fuels: correlation between MOF structure and catalytic activity

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