Synthesis and characterization of new nanocomposite TBA-PW11Ni@NiO as an efficient and reusable heterogeneous catalyst in oxidative desulphurization of gasoline

摘要

In this manuscript, the catalytic oxidative desulphurization (CODS) process was proposed to reduce the sulphur-containing compounds in gasoline. The quaternary ammonium salt of mono nickel-substituted lphosphotungstate was synthesized and supported on nickel oxide ((n-C4H9)(4)N)(4)H[PW11NiO39]@NiO (TBA-PW11Ni@NiO) as a new nanocatalyst. The nanocomposite was prepared via sol-gel method and finally calcined at 400 degrees C for 4 h. The materials characterized by means of FT-IR, UV-vis, XRD, and SEM techniques. The catalytic activity of the nanocatalyst was tested on oxidative desulphurization of gasoline by using CH3COOH/H(2)O2 as oxidant at 35 degrees C after 1 h. Besides, the results were compared with the oxidation process of prepared model fuel under the same conditions. According to the obtained results, the removal efficiency of mercaptans and sulphur content of gasoline fuel could reach 96% and 97%, respectively; while the other properties remained unchanged. The synthesized heterogeneous nanocatalyst could be separated and recycled successfully after five times. This system is suggested as an effective strategy with a great potential in the preparation of clean gasoline fuel. (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.