A novel method for preparing well dispersed and highly sulfided NiW hydrodenitrogenation catalyst

This article presents a novel method for preparing hydrodenitrogenation (HDN) catalysts via combined phosphorous modification of alumina and ethylenediaminetetraacetic acid (EDTA)-assisted dispersion of active metals. The results showed that the catalyst prepared with this method possessed high dispersion of nickel and tungsten species, ascribed to EDTA addition. Simultaneously, high sulfidation degree of tungsten and nickel species was obtained due to the addition of phosphorous and EDTA. So the catalyst prepared by this method exhibited a greatly enhanced hydrodenitrogenation activity than the conventional method prepared.

TEM imagine of sulfided EDTANiW/P/Al2O3 catalyst.Figure optionsDownload as PowerPoint slideHighlights
► A new EDTANiW/P/Al2O3 catalyst for HDN was developed.
► The dispersion and sulfidation degree of NiW species were determined by XPS.
► The EDTANiW/P/Al2O3 catalyst exhibited excellent activity for quinoline HDN.