The kinetics of oxidative desulfurization of diesel fraction with a hydrogen peroxide-formic acid mixture

Krivtsov, E. B.; Головко, А. К.

doi:10.1134/s0965544114010083

Cited by 22 publications

(10 citation statements)

References 19 publications

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“…Moreover, in 2014 Krivstov and Golovko [14] introduced another factor affecting thiophenic molecules reactivities (substituted benzo and dibenzo thiophene) during the oxidative desulfurization of VGO using hydrogen peroxide and formic acid. They found that in addition to the increased electron density on the sulfur atom and steric hindrance due to the alkyl substituents, the inductive effect has a positive influence ameliorating reactivity rate.…”

Section: 926mentioning

confidence: 99%

“…A range of temperatures was tested across the literature. Oxidation reactions are generally carried out at temperatures between 35 and 90 • C. Oxidation of petroleum feed at 35 • C was investigated by Krivstov and Golovko (2013) [14]. The oxidation of high sulfur diesel SRGO by hydrogen peroxide and formic acid with an oxidant to acid molar ratio H 2 O 2 :HCOOH of 3:4 followed by adsorption of oxidized products with silica gel reduced the total sulfur from 1.19 wt.%S to 0.05 wt.%S within eight hours.…”

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

“…In ODS, it is quite rare to find an efficient oxidant-catalyst system allowing desulfurization in a few minutes. Oxidation time varies mostly between 1 and 10 h [13,14,16,23,36]. However, Mohammed et al [31] have demonstrated desulfurization of crude oil in 15 min (results mentioned above), while Otsuki et al (2010) [10] reported the oxidation of SRGO and VGO using H 2 O 2 /HCOOH in 36 h. This long reaction time was mainly related to the multiple steps used for the addition of oxidant and acid in small fractions.…”

Section: Reaction Timementioning

confidence: 99%

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Oxidative Desulfurization of Heavy Oils with High Sulfur Content: A Review

et al. 2018

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The demand for clean fuels is increasing throughout the world, with more stringent environmental regulations for transportation fuels including marine fuels, particularly regarding their sulfur content. Moreover, the quality of crude oil and derived petroleum cuts is getting lower while fossil fuels are still in high demand. Heavy oils are characterized by high sulfur content where most sulfur is found in bulky thiophenic structures difficult to remove using conventional high pressure hydrodesulfurization process. However they appeared more reactive in oxidative desulfurization (ODS) process, carried out at mild conditions without hydrogen pressure. This review focuses for the first time on the heavy fuels initially containing more than 0.5 wt.%S and upgraded by the ODS process. Different attractive approaches of the literature towards ODS are reported using homogeneous and heterogeneous catalysis. Recent developments in ODS assisted with ultrasound technology and the use of ionic liquid to enhance ODS efficiency will be fully detailed and discussed to better understand their viability when applied to high sulfur content, high viscosity, and high boiling point feeds.

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Section: 926mentioning

confidence: 99%

Section: Effect Of Reaction Temperaturementioning

confidence: 99%

Section: Reaction Timementioning

confidence: 99%

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Oxidative Desulfurization of Heavy Oils with High Sulfur Content: A Review

et al. 2018

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“…Brønsted acids (sulfuric acid, phosphoric acid, formic acid, acetic acid, etc.) are often used as catalysts for oxidation of sulfur compounds [28,31]. Catalytic systems based on ionic liquids containing Brønsted acidity are also known [32,33].…”

Section: Introductionmentioning

confidence: 99%

Deep Oxidative Desulfurization of Fuels in the Presence of Brönsted Acidic Polyoxometalate-Based Ionic Liquids

et al. 2020

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Polyoxometalate-based ionic liquid hybrid materials with a pyridinium cation, containing Brönsted acid sites, were synthesized and used as catalysts for the oxidation of model and real diesel fuels. Keggin-type polyoxometalates with the formulae [PMo12O40]3−, [PVMo11O40]4−, [PV2Mo10O40]4−, [PW12O40]3− were used as anions. It was shown that increasing the acid site strength leads to an increase of dibenzothiophene conversion to the corresponding sulfone. The best results were obtained in the presence of a catalyst, containing a nicotinic acid derivative as cation and phosphomolybdate as anion. The main factors affecting the process consisting of catalyst dosage, temperature, reaction time, oxidant dosage were investigated in detail. Under optimal conditions full oxidation of dibenzothiophene and more than a 90% desulfurization degree of real diesel fuel (initial sulfur content of 2050 ppm) were obtained (the oxidation conditions: NK-1 catalyst, molar ratio H2O2:S 10:1, molar ratio S:Mo 8:1, 1 mL MeCN, 70 °C, 1 h). The synthesized catalysts could be used five times with a slight decrease in activity.

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“…Oxidative desulfurization can be carried out at room temperature and atmospheric pressure, which can significantly reduce the cost of the process. During desulfurization sulfur compounds are oxidized to sulfones and sulphooxides, which are then easily removed by conventional separation methods, since their properties are significantly different from the properties of petroleum hydrocarbons that form the basis of fuels [9].…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Intensification of Diesel Fuel Desulfurization: Review

Akhmadov¹,

Akhmadova²,

Махмудова³

et al. 2018

Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018)

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The article shows that nowadays the strict requirements are being applied to the quality of diesel fuel (DF), especially to the content of organic sulfur compounds. These requirements must comply with European standards. Desulfurization of diesel fuels is carried out by different methods with the use of both classical technologies and non-traditional ones. One of the methods for the intensification of desulfurization is an ultrasonic treatment method, whose results used for desulfurization of diesel fuel are considered in this article.

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The kinetics of oxidative desulfurization of diesel fraction with a hydrogen peroxide-formic acid mixture

Cited by 22 publications

References 19 publications

Oxidative Desulfurization of Heavy Oils with High Sulfur Content: A Review

Oxidative Desulfurization of Heavy Oils with High Sulfur Content: A Review

Deep Oxidative Desulfurization of Fuels in the Presence of Brönsted Acidic Polyoxometalate-Based Ionic Liquids

Ultrasonic Intensification of Diesel Fuel Desulfurization: Review

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