A new route to prepare supported nickel phosphide/silica-alumina hydrotreating catalysts from amorphous alloys

摘要

Supported nickel phosphides were prepared by treating an amorphous Ni-B alloy on silica-alumina support with phosphine(15 vol.% PH3/H2)at relatively low temperature.The amorphous Ni-B/SiO2-Al2O3 precursors were synthesized by silver-induced electroless plating.The amorphous precursors and catalysts were characterized by X-ray diffraction,high-resolution transmission electron microscopy,selected area electron diffraction,BET surface area and inductively coupled plasma measurements.The transmission electron micrographs of the Ni2P/SiO2-Al2O3 particles with their size ranging from 60 to 80 nm showed that they were homogeneously dispersed over the SiO2-Al2O3 support.The as-prepared catalysts exhibited an excellent catalytic activity in the hydrodesulfurization(HDS)of dibenzothiophene.