Synthesis of t-B.PWFe/NiO nanocomposite as an efficient and heterogeneous green nanocatalyst for catalytic oxidative-extractive desulfurization of gasoline

摘要

This study aimed to improve the efficiency of sulfur removal from real and model liquid fuel, which is still a challenge. The heterogeneous nanocatalyst was synthesized successfully by supporting ([n-C_4H_9N)4H[PW_(11)FeO_(39),] (t-B.PWFe), on nickel oxide (NiO) as a new nanocomposite (t-B.PWFe/NiO) via sol-gel method. The catalytic activity of the nanocomposite was evaluated for oxidative-extractive desulfurization (OEDS) of model fuel and real gasoline using CH_3COOH/H_2O_2 as an oxidant. The synthesized nanocatalyst was characterized by means of X-ray diffraction, scanning electron microscopy, Fourier transform infrared, ultraviolet-visible spectroscopy (UV-Vis), and cyclic voltammetry. From UV-Vis, the bandgap energy is found. After OEDS treatments, the obtained results were specified that mercaptans and total sulfur content of real gasoline lowered with about 97% yield. Mechanisms, kinetic studies, and the effect of various operational parameters were evaluated, such as temperature and time on the oxidation reaction. The unique performance of the t-B. PWFe/NiO proved the extreme capability of this system for sulfur removal to achieve purified and clean gasoline.