Ultrasound-assisted oxidative-adsorptive desulfurization using highly acidic graphene oxide as a catalyst-adsorbent

[Display omitted] Modified graphene oxide by acetic acid moiety (GO/COOH) was synthesized and employed in the ultrasound-assisted oxidative-adsorptive desulfurization processes. The modified graphene oxide was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM...

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Bibliographic Details
Published in:Fuel (Guildford) 2017-12, Vol.210, p.639-645
Main Authors: Abdi, G., Ashokkumar, M., Alizadeh, A.
Format: Article
Language:English
Subjects:
Acetic acid
Acidic oxides
Adsorbents
Adsorption
Adsorptivity
Catalysis
Catalyst-adsorbent materials
Catalysts
Desulfurization
Desulfurizing
Dibenzothiophene
Diesel fuels
Effects
Electron microscopy
Fourier transforms
Graphene
Infrared spectroscopy
Kinetics
Modified-graphene oxide
Oxidation
Oxidative-adsorptive desulfurization
Photoelectron spectroscopy
Raman spectroscopy
Scanning electron microscopy
Spectroscopy
Sulfur
Sulfur content
Sulfur removal
Temperature
Transmission electron microscopy
Ultrasound
X ray photoelectron spectroscopy
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Summary:[Display omitted] Modified graphene oxide by acetic acid moiety (GO/COOH) was synthesized and employed in the ultrasound-assisted oxidative-adsorptive desulfurization processes. The modified graphene oxide was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The fabricated material was applied to simultaneous oxidation and adsorption of dibenzothiophene (DBT) from model fuel. Adsorption studies were carried out to evaluate its potential for DBT removal. The effects of contact time, initial DBT concentration, and temperature on the removal efficiency of the catalyst-adsorbent were investigated. The equilibrium adsorption results was well-described by the Freundlich isotherm model (at room temperature) and oxidation-adsorption of DBT were achieved by GO/COOH with an outstanding adsorption capacity of 370mgg−1. The adsorption process followed a pseudo-first-order kinetic model and the adsorption kinetic data suggests that physical interactions are mainly involved on the entire adsorption process (Ea
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2017.09.024