Abstract
A series of phosphorus promoted γ-Al 2O 3 supported NiMo carbide catalysts with 0–4.5 wt.% P, 13 wt.% Mo and 2.5 wt.% Ni were synthesized and characterized by elemental analysis, pulsed CO chemisorption, BET surface area measurement, X-ray diffraction, near-edge X-ray absorption fine structure, DRIFT spectroscopy of CO adsorption and H 2 temperature programmed reduction. X-ray diffraction patterns and CO uptake showed the P addition to NiMo/γ-Al 2O 3 carbide, increased the dispersion of β-Mo 2C particles. DRIFT spectra of adsorbed CO revealed that P addition to NiMo/γ-Al 2O 3 carbide catalyst not only increases the dispersion of Ni-Mo carbide phase, but also changes the nature of surface active sites. The hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) activities of these P promoted NiMo/γ-Al 2O 3 carbide catalysts were performed in trickle bed reactor using light gas oil (LGO) derived from Athabasca bitumen and model feed containing quinoline and dibenzothiophene at industrial conditions. The P added NiMo/γ-Al 2O 3 carbide catalysts showed enhanced HDN activity compared to the NiMo/γ-Al 2O 3 catalysts with both the feed stocks. The P had almost no influence on the HDS activity of NiMo/γ-Al 2O 3 carbide with LGO and dibenzothiophene. P addition to NiMo/γ-Al 2O 3 carbide accelerated C N bond breaking and thus increased the HDN activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
