Abstract: The selective hydrodesulfurization technology of residue from the Middle East high-sulfur crude was deeply researched and developed from the aspects of catalyst development, process condition optimization, catalyst gradation and activity stability. The results showed that the hydrodesulfurization activity of the newly developed hydrodemetallization and hydrodesulfurization catalysts for selective hydrodesulfurization of residue was significantly higher than that of conventional hydrodemetallization and hydrodesulfurization catalysts. When the sulfur content of the hydrogenated oil was equal, proper hydrogen partial pressure, lower volumetric space velocity and higher hydrogen-to-oil ratio, as well as lower reaction temperature could improve the hydrodesulfurization selectivity. Compared with the conventional technology, the reaction temperature of the newly developed residue selective hydrodesulfurization technology was lower by 7 ℃, the CCR of hydrogenated oil was higher by 11.5%, and the hydrogen consumption was lower by 7%-11% under the condition of comparable hydrodesulfurization rate.

Key words: residue hydrotreating, hydrodesulfurization, selectivity, hydrogen consumption