"Hydrogenated shale gas oil products from catalyzed and noncatalyzed runs were analyzed using nonaqueous potentiometric titration and infrared analysis, following an analytical scheme proposed by Koros. Results indicate that the shale gas oil denitrification reaction is limited by a hydrogenation step. Dealkylation of pyridine type nitrogen was found to be an important reaction. In all cases the net rate of conversion of the more stable pyridine type nitrogen was greater than that of the less stable pyrrole type nitrogen. It appears that polymeric compounds break down into pyrrole type compounds more rapidly than intopyridine type compounds."