Desulfurization of Kerosene by the Electrochemical Oxidation and Extraction Process

Tang, Xiaodong; Hu, Tao; Li, Jingjing; Wang, Fang; Qing, Dayong

doi:10.1021/ef502437m

Cited by 32 publications

(38 citation statements)

References 22 publications

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“…In addition, HDS is difficult to remove heterocyclic organosulfur such as benzothiophene (BT), dibenzothiophene (DBT) and their derivatives. Due to these reasons, many groups [7][8][9][10] have been engaged in the exploitation of non-HDS technologies for transportation fuels, including extraction [11][12] , oxidation [13][14] , adsorption [15][16] , biological desulfurization [17][18] and others [19][20] .…”

Section: Introductionmentioning

confidence: 99%

Green Carboxylic Acid-Based Deep Eutectic Solvents as Solvents for Extractive Desulfurization

et al. 2016

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The extractive desulfurization of thiophene (TS), dibenzothiophene (DBT), and benzothiophene (BT) in model oil was carried out using carboxylic acid-based deep eutectic solvents (DES). It was found that DES formed by formic acid as hydrogen bond donor and Tetrabutylammonium bromide (TBAB) as hydrogen bond acceptor could efficiently separate organosulfur from oils. The influence parameters in this process were discussed, such as extraction temperature, reaction time, mass ratio of DES to oil; multistage extraction effect; recycle times and regeneration of DES. The results showed that the desulfurization selectivity of TBAB/HCOOH followed the order TS < BT ≈DBT. Under the Optimized conditions, the sulfur removal of BT, DBT and TS were 81.75%, 80.47% and 72% in a single stage, respectively, and after three cycles, it will rise to 98.32%, 98.24% and 97.6%. The sulfur content in fuels can be achieved to less than 8.4, 8.8 and 12 ppm for BT, DBT and TS. In addition, by mechanism discussion, it was proved that hydrogen bonding between the sulfide and DES was the main driving force of the extraction desulfurization process.

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Section: Introductionmentioning

confidence: 99%

Green Carboxylic Acid-Based Deep Eutectic Solvents as Solvents for Extractive Desulfurization

et al. 2016

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“…During the electrochemical oxidation under optimized working conditions, sulfur aromatic compounds and their derivatives are easily oxidized to the corresponding sulfoxides and sulfones by direct electron transfer. These oxidized products can be subsequently removed by liquid-liquid extraction or adsorption techniques [21][22][23][24]. Simultaneously, ROS can also be produced from water electro-oxidation using anodes having different compositions, morphologies and structural properties [25][26][27][28].…”

Section: Several Articles Have Focused On Electrochemical Desulfurization (Ecds) As a Newmentioning

confidence: 99%

Electrochemical oxidation of dibenzothiophene compounds on BDD electrode in acetonitrile–water medium

Dávila

Lacalle-Bergeron

Gutiérrez³

et al. 2019

Journal of Electroanalytical Chemistry

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The electrochemical oxidation of dibenzothiophene and two derivatives, namely 4methyldibenzothiophene and 4,6-dimethyldibenzothiophene, was investigated either separately or as a mixture, on a BDD anode in a miscible acetonitrile (87.5% v/v)-water (12.5% v/v, 0.01 M NaNO 3) solution. Linear sweep voltammetry, cyclic voltammetry, chronoamperometry and bulk electrolysis under potentiostatic conditions suggested the probable occurrence of two pathways: direct electrochemical oxidation and indirect reaction with hydroxyl radicals and other reactive oxygen species formed at the BDD anode surface during water discharge. The products extracted upon electrolysis at 1.5 and 2.0 V vs. SCE were analyzed by Fourier-transform infrared spectroscopy, gas chromatography-mass spectrometry and ultra-high performance liquid chromatography coupled to electrospray ionization and quadrupole time-of-flight mass spectrometry (UHPLC-ESI-Q-TOF-MS). The main molecules identified were the corresponding sulfoxides or sulfones, depending on the applied anodic potential. Possible oxidation routes for the dibenzothiophene compounds are proposed.

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“…Besides, carbonchlorine bond was also observed aer electrochemical oxidation, this is because a part of organic suldes which with weak reductive (such as mercaptans) can react with ClO À and Cl 2 to sulfonyl chloride compounds. 39 The GC-FPD chromatograms of raw and oxidized condensate gasoline aer NMP extraction were presented in Fig. 6.…”

Section: Ftir and Gc-fpd Analysismentioning

confidence: 99%

Deep desulfurization of condensate gasoline by electrochemical oxidation and solvent extraction

Tang

et al. 2015

RSC Adv.

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Organic sulfides in liquid fuels have become one of the main sources of serious air pollution. To meet the environmental requirements, deep desulfurization of high sulfur-containing liquid fuels is necessary. In this paper, the combination of electrochemical oxidation and solvent extraction was proposed to reduce the sulfur content in condensate gasoline. FTIR and GC-FPD were utilized to analyze oxidation products and confirm the reaction process. The experimental results indicated that adding a supporting electrolyte such as sodium chloride can markedly promote the oxidative desulfurization process. The oxidation products with strong polarity can be extracted by polar solvents effectively. The optimal electrochemical oxidation conditions were as follows: supporting electrolyte, electrolysis temperature, electrolysis time, volume ratio of electrolyte solution to raw oil and stirring rate were 4mol L À1 NaCl, 298 K, 50 min, 3.0, 500 rpm, respectively. After electrochemical oxidation and three-stage extraction, the sulfur content of the condensate gasoline decreased from 3478.4 mg g À1 to 13.1 mg g À1 and desulfurization efficiency reached 99.62%. Furthermore, the mechanism of electrochemical oxidation and solvent extraction desulfurization has been discussed.

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Desulfurization of Kerosene by the Electrochemical Oxidation and Extraction Process

Cited by 32 publications

References 22 publications

Green Carboxylic Acid-Based Deep Eutectic Solvents as Solvents for Extractive Desulfurization

Green Carboxylic Acid-Based Deep Eutectic Solvents as Solvents for Extractive Desulfurization

Electrochemical oxidation of dibenzothiophene compounds on BDD electrode in acetonitrile–water medium

Deep desulfurization of condensate gasoline by electrochemical oxidation and solvent extraction

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