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• W2328025023 abstract "A dynamic electrochemical technique was used for desulfurization of thiophene-containing solutions. First, adsorption of thiophene from an aqueous solution onto a platinum electrode surface and electrooxidative behavior of thiophene were studied using a cyclic voltammetry technique, and then, a square wave potentiometry method was utilized to electrochemically desulfurize the aqueous thiophene solution and a thiophene-containing model fuel. Results indicated that, for thiophene molecules, the best adsorption potential is 0.2 V and the maximum electrooxidation rate occurs at 1.1 V. Also, the optimal square wave frequency was found as 50 Hz. Ion chromatographic measurement of sulfate ion concentration revealed that reaction conversion was 100% in the electrooxidative desulfurization of aqueous thiophene solution. The high desulfurization efficiency can be attributed to excellent electrocatalytic activity of the platinum electrode and performing experiments at the best operating conditions. On the basis of gas chromatographically quantitated thiophene concentration in the hydrocarbon phase, desulfurization reactions reached a conversion of about 88% during electrooxidative desulfurization of a model fuel/aqueous electrolyte emulsion. The lower desulfurization efficiency can be attributed to addition of a mass transfer (from hydrocarbon to aqueous phase) resistance and lessening the overall thiophene concentration. Ion chromatographic analysis of the aqueous phase revealed that only 38% of thiophene molecules were completely oxidized to sulfate ions. Fourier transform infrared spectroscopy studies of the hydrocarbon and the aqueous phases showed that the remaining part of converted thiophene molecules were partially oxidized to a sulfone and an organic sulfate compound. Due to polarity of these components, which results in their aqueous phase solubility, no more steps were required to separate the products of desulfurization from the hydrocarbon phase. On the basis of the obtained results, electrochemical desulfurization can be proposed as an effective alternative for the commercial hydrodesulfurization processes." @default.
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• W2328025023 date "2015-05-07" @default.
• W2328025023 modified "2023-09-27" @default.
• W2328025023 title "Electrooxidative Desulfurization of a Thiophene-Containing Model Fuel Using a Square Wave Potentiometry Technique" @default.
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• W2328025023 doi "https://doi.org/10.1021/acs.energyfuels.5b00354" @default.
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