Effect of Phosphorus Content in the Support of NiMoW/P–Al2O3 Quaternary Hydrotreating Catalysts on Their Hydrodesulfurization and Hydrogenation Activity

Abstract

A set of NiMoW/P–Al₂O₃ catalysts with different P₂O₅ concentrations in the support (0, 0.5, 1.0, 2.0, 5.0 wt % P₂O₅; Mo : W = 1 : 2) has been synthesized using the following precursors: H₃PMo₁₂O₄₀ and H₃PW₁₂O₄₀ heteropoly acids for MoO₃ and WO₃, respectively, and nickel citrate for NiO. The morphology and surface composition of the sulfide phase of the samples have been studied by high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy; the catalytic activity of the samples in the dibenzothiophene hydrodesulfurization and naphthalene hydrogenation reactions has been determined.