NiMo/Al sub(2O) sub(3) catalyst containing nano-sized zeolite Y for deep hydrodesulfurization and hydrodenitrogenation of diesel

Two mixed-matrix NiMo/Al sub(2O) sub(3) catalysts containing nano- and micro-sized zeolite Y have been prepared to explore the size effect of zeolite Y particle on the hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) activities of fluid catalytic cracking (FCC) diesel. They were characterized by SEM, BET, XRD, H sub(2-TPR, NH) sub(3)-TPD and HRTEM. The results show that the catalyst containing nano-sized zeolite Y possesses larger average pore diameter, higher pore volume, weaker and lesser acid sites, more easily reducible metal phases, shorter MoS sub(2 slabs and more slab layers than the catalyst containing micro-sized zeolite Y. The catalysts were also evaluated with a high-pressure fixed-bed reactor using real FCC diesel as feed. The results display that the catalyst containing nano-sized zeolite Y bears higher HDS and HDN activities and exhibits higher relative rate constant for the removal of total sulfur or nitrogen than the one containing micro-sized zeolite.)