Abstract: At various LHSV and reaction temperatures，the hydrotreated residues with different sulfur contents were obtained using Maoming AR（high-sulfur residue）and Hainan RDS feed （low-sulfur residuum oil）as feedstocks. The sulfur distribution analysis showed that the changing rules of sulfur content in asphaltene are different with different sulfur contents in the hydrotreated oils. For Maoming AR，in the case of the sulfur content in the hydrogenated oil is not less than 0.31%，the lower the sulfur content in hydrotreated oil，the lower the sulfur content in asphaltene. For Hainan residue，when the sulfur content in the hydrogenated oil is not larger than 0.25%，the sulfur content in asphaltene becomes larger as reduction of sulfur content in hydrotreated product. The same variation tendency of the ratio of sulfur content in the asphaltene over the total sulfur content in the hydrotreated oil was observed: the lower the sulfur content in product and the greater the reduction of sulfur content, the higher the ratio of the sulfur content in asphaltene.

Key words: residue hydrotreating, product, asphaltene, sulfur content, distribution