The Effect of Different Supports on the ‎Characteristic and Catalytic Properties of ‎ Ni-Mo/Cs1.5H1.5PW12O40/S (S= SiO2 or Al2O3 or ‎ASA) Nanocatalysts in Hydrocracking of n-‎decane

Abstract

<em> In this research, Ni-Mo/Cs_1.5H_1.5PW₁₂O₄₀/S (S=SiO₂ or Al₂O₃ or ASA (amorphous silica alumina)) nanocatalysts with different supports were prepared via 2 steps with impregnation method and the effect of support on the characteristic and catalytic properties of the prepared samples was studied. The synthesized samples were characterized by X-ray diffraction (XRD), temperature programmed desorption (TPD), temperature programmed reduction (TPR), and energy dispersive X-ray spectroscopy (EDX). Morphology of the samples was studied by field emission scanning electron microscope (FE-SEM) and the surface area, pore volume and pore size of the catalysts were determined by BET (Brunauer-Emmett-Teller) method. In the XRD patterns of the prepared catalysts, the H₃PW₁₂O₄₀ (HPW) phase was observed. The FE-SEM images showed that the synthesized particles were in nanoscale. The results of TPD studies indicated that moderate acidic sites of Al₂O₃ supported nanocatalyst was more than the others. The catalytic activity of the nanocatalysts in hydrocracking of n-decane indicated that Al₂O₃ supported nanocatalyst had the highest catalytic activity.</em>