A New Kinetic Model Development and Modeling of Hydrotreating Reaction for Vacuum Gas Oil (VGO)

In this work a novel Langmuir-Hinshelwood-Hougen-Watson (LHHW) kinetic equation has been proposed for hydrodesulfurization (HDS) and used an unusual hydrodenitrogenation (HDN) kinetic equation. These equations include inhibitive effect of nitrogenous compounds (basic and nonbasic) on the HDS reaction and the activating effect of H2S concentration on HDN reactions (basic and nonbasic). Three phase reactor model that incorporates the effect of hydrodynamics has been developed. The concentration profiles obtained using the proposed kinetics for hydrotreating reactions were compared with other kinetic models and pilot plant experimental data available in the literature. The predicted value showed a very good agreement with the experimental data. The average absolute error for all predictions is <1.5% while the published value in the literature is <2%.