In order to reduce the sulfur compounds in diesel fuel

boron nitride (BN) has been used as a novel metal-free catalyst in the present research. This nanocatalyst was synthesized

via

template-free approach followed by heating treatment at 900 ℃ in nitrogen atmosphere that the characteristics of the sample were identified by the X-ray diffraction

Fourier-transform infrared spectroscopy

Raman spectroscopy

field emission scanning electron microscopy

transmission electron microscopy

atomic force microscopy

and N

2

adsorption-desorption isotherms. The results of structural and morphological analysis represented that BN has been successfully synthesized. The efficacy of the main operating parameters on the process was studied by using response surface methodology based on the Box-Behnken design method. The prepared catalyst showed high efficiency in oxidative desulfurization of diesel fuel with initial sulfur content of 8040 mg·kg

-1

S. From statistical analysis

a significant quadratic model was obtained to predict the sulfur removal as a function of efficient parameters. The maximum efficiency of 72.4% was achieved under optimized conditions at oxidant/sulfur molar ratio of 10.2

temperature of 71

reaction time of 113 min

and catalyst dosage of 0.36 g. Also

the reusability of the BN was studied

and the result showed little reduction in activity of the catalyst after 10 times regeneration. Moreover

a plausible mechanism was pr

oposed for oxidation of sulfur compounds on the surface of the catalyst. The present study shows that BN materials can be selected as promising metal-free catalysts for desulfurization process.