Abstract
Bulk Ni2P and Al2O3-supported Ni2P were prepared at low phosphidation temperature (300°C) from Ni9S8 and NH4H2PO2, which were separated to avoid the formation of phosphate inside the support pores. The unsupported product phases were characterized by XRD and the Ni2P/Al2O3 catalysts by XRD, BET and TEM. A 10wt.% Ni2P/Al2O3 catalyst, made by the Ni(NO3)2–NiO–Ni9S8–Ni2P path at a P/Ni ratio of 3, showed the highest activity in the hydrodesulfurization of dibenzothiophene. By separating the nickel and hypophosphite sources, Ni2P/Al2O3 catalysts could be obtained at low phosphidation temperature and with low degree of blockage of pores by surplus phosphorus.
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