Abstract: The hydrotreating conversion performance of different asphaltenes separated by different solvent in decalin was investigated in an autoclave. The results show that the asphaltenes have better hydrotreating conversion performance in decalin with the conversion rate higher than 60%, and coke yield lower than that of corresponding residue. The conversion of pentane-asphaltenes is higher than that of heptane-asphaltenes from the same raw material because of the different structure and composition of asphaltenes separated by different solvents. The coke yield of asphaltenes from paraffin-based crude used in this study is higher, and the conversion and product distribution are slightly lower, which is different from the traditional understanding. It shows that the hydrogenation reactivity of asphaltenes is not only related to the base genus of residual oil raw materials, but also to the molecular structure of asphaltenes itself.

Key words: asphaltenes, type of crude oil, separation solvent, decalin, hydrotreating conversion