Effect of Polyethylene Glygol on Preparation and Performance of Ni-Mo Hydrodesulfurization Catalysts

Abstract

N i -M o c a t a l y s t p re c u r s o r s w e re p re p a re d b y t h e p re c i p i t a t i o n m e t h o d . N i -M o b u l khydrodesulfurization catalysts were obtained from these precursors after proper drying, molding, and calcination. The effect of polyethylene glycol (PEG) with different molecular weights and in various dosages on the structure and catalytic properties of these catalysts was investigated by applying X-ray diffraction, low-temperature BET N 2 adsorption analysis, and scanning electron microscopic methods. It is shown that the structure, surface properties, and activity of the catalysts can be improved by adding PEG. The pore volume, specific surface area, and pore size of the catalysts increase gradually with increasing PEG dosage, and the dispersion of the active ingredient increases initially and then decreases.Significantly increasing the activity of supported hydrodesulfurization catalysts for the purpose of producing diesel fuel with ultra-low sulfur content to meet market demand is challenging due to the limitations with respect to the amount of active ingredient that can be loaded, so unsupported catalysts (bulk catalysts) have been receiving more attention [1][2][3]. These catalysts provide a greater degree of desulfurization, denitrification, and aromatics saturation [4-6], allowing their use for upgrading low-quality diesel

C9 Petroleum Resin Hydrogenation over a PEG1000-Modified Nickel Catalyst Supported on a Recyclable Fluid Catalytic Cracking Catalyst Residue

“…The diffraction peaks of Ni/FC3R were intense and sharp, whereas the peaks of Ni-PEG1000/FC3R were weak and broad. The crystallite sizes of Ni were estimated using the Scherrer equation, which were approximately 22.5 and 12.3 nm for Ni/FC3R and Ni-PEG1000/FC3R, respectively. These results indicated that a high dispersion of Ni on the support and smaller crystallite size could be obtained after the treatment of PEG1000; the reason could be attributed to the adsorption of PEG1000 on the surface of FC3R, which inhibited the aggregation of crystallites …”