Hydroprocessing of Phenothiazine Catalyzed by Co-Mo/γ-Al2O3

Article abstract of DOI:10.1021/j100211a018

The hydroprocessing of phenothiazine catalyzed by sulfided Co-Mo/γ-Al2O3 was studied in a batch autoclave at 573 K and 6.89*E6 Pa.Hydrodesulfurization (HDS) occurs much more rapidly than hydrodenitrogenation (HDN) and occurs 10-fold more rapidly than hydrodesulfurization of dibenzothiophene (a similar sulfur-containing compound) and 50-fold more rapidly than hydrodesulfurization od dibenzothiphene with an equimolar concentration of acridine.A one point adsorption model for the reaction mechanism cannot explain the data; a flat, ring adsorption enhanced by strong involvement of the electrons of the nitrogen atom and with partial hydrogen ation followed by β elimination is strongly favored.