Gas oil fractions of different fossil fuels (middle east crude oil, oil sand bitumen and shale oil) were hydrotreated over NiMo/Al_2O_3 catalyst at 310 to 370℃, and the kinetics data of HDS, HDN and HY were obtained. The chemical compositions of the feedstocks were analyzed by using a capillary GC, equipped with several detectors (FID, SCD, NPD, MSD). The relation between the chemical composition and reactivities will be discussed.
