Synthesis of Carbon Nitride Supported POM‐based IL for Deep Oxidative Desulfurization of Dibenzothiophene

Abstract

AbstractThe organic cation methyl imidazolium 1‐(3‐sulfonic) propyl (MIMPs) and the polyoxometalate (H3PMo6W6O40) were combined to synthesis [MIMPs]3PMo6W6O40 successfully, which was loaded on graphitic carbon nitride (g‐C3N4). The composite materials [MIMPs]3PMo6W6O40/g‐C3N4 catalysts were characterized by means of FT‐IR, XRD, TEM, XPS and nitrogen adsorption–desorption analysis (BET). Verified by various characterizations, synthesis and immobilization process could occur electron migration to improve the electronic and textural properties of [MIMPs]3PMo6W6O40/g‐C3N4 catalyst. At the optimal conditions of mcatalyst/VOil=0.1 g/10 mL, m[MIMPs]3PMo6W6O40: m[MIMPs]3PMo6W6O40/g‐C3N4=30 %, O/S=5 (molar ratio), the desulfurization rate reaches 100 % within 40 min. In addition, the concentration of aromatics had little effect on the reaction. Furthermore, the catalyst also shows high rate of desulfurization on real oil. The ODS reaction mechanism of this catalyst is also investigated.