Kinetics of individual and simultaneous hydrodenitrogenations of aniline and pyridine

Individual and simultaneous hydrodenitrogenations (HDN) of aniline and pyri dine were examined over Ni-Mo-P/alumina catalyst. The HDN rate of aniline w as greater than that of pyridine when each HDN reaction was carried out sep arately. HDN of aniline, however, was inhibited by pyridine when the HDN of aniline and pyridine mixture was examined. Both individual and simultaneou s reactions of aniline and pyridine were quantitatively predicted by Langmu ir-Hinshelwood equations. Adsorption strengths and HDN rate constants of an iline and pyridine in the equations were kinetically estimated from experim ental results. (C) 2000 Elsevier Science B.V. All rights reserved.