Optimization of Adsorption Parameters Using Central Composite Design for the Removal of Organosulfur in Diesel Fuel by Bentonite-Supported Nanoscale NiO-WO3

Document Type : Research Article


1 Department of Chemistry, Payame Noor University (PNU), Tehran, I.R. IRAN

2 Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, I.R. IRAN

3 Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, I.R. IRAN


Desulfurization using porous materials is based on the capability of a solid sorbent to selectively adsorb organic sulfur-containing compounds. In the present study, different sorbents were prepared by varying the NiO/WO3 loadings onto bentonite for the removal of sulfur from commercial diesel fuel containing approximately 100 ppm total sulfur (S). X-Ray Diffraction (XRD), Fourier Transform InfraRed (FT-IR) spectroscopy, and Scanning Electron Microscopy (SEM) showed the ability of modified bentonite to adsorb dibenzothiophene (DBT) depends strongly on the surface chemistry, particularly on the presence of basic oxygen-containing groups and acid content. A Plackett–Burman Design (PBD) was chosen as a screening method to estimate the relative influence of the factors that could have an influence on the analytical response. The significant variables included: sorbent amount, feed volume, extraction solvent kind, and its volume were optimized using Central Composite Design (CCD). 93.5% removal of sulfur was observed with NiO@WO3@bentonite.


Main Subjects

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