optimization of adsorption parameters using central composite design for the removal of organosulfur in diesel fuel by bentonite-supported nanoscale nio-wo3

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.