Abstract: The pilot-scale experiment of residue hydrogenation was carried out on a fixed-bed reactor with four reactors in series, and the reactions on different type catalysts were analyzed. The results showed that on the hydrodemetallization catalyst, the main reaction was hydrodesulfurization and hydrodemetallization. The removal amount of sulfur and (Ni+V) was for 67.12% and 83.67% of the total amount of removal, respectively. On the catalysts for hydrodesulfurization and carbon reduction, hydrodenitrogenation, hydrodesulphurization and aromatics hydrogenation saturation were the main reactions; the removal amounts of nitrogen and sulfur accounted for 78.57% and 32.88% of the total amount removed, respectively; the increase of hydrogen mass fraction accounted for 66.96% of the total increase. The increasing range of reactor temperature rise of fixed bed residue hydrogenation industrial unit during processing different characteristic feedstock was investigated. The results showed that compared with processing low sulfur and high nitrogen residue, the reduction of sulfur content and density of hydrogenation products of high sulfur and low nitrogen residue was greater, more hydrodesulfurization and aromatics hydrogenation saturation reactions occurred on the catalysts, and the temperature rise of hydrodemetallization reactor and the total temperature rise of all stages of the reactor were higher.

Key words: residue, hydrogenation, fixed-bed, temperature rise of reactor