Abstract: The combination technology of fixed-bed residue hydrogenation-catalytic cracking (deep catalytic cracking) is an important technology for refineries to realize low-cost chemical transformation. Improving the activity and stability of residue hydrodesulfurization catalyst can not only effectively improve the chemicals yield of the downstream catalytic cracking unit, but also help to prolong the operation cycle of the residue hydrodesulfurization unit, and then make the operation and maintenance cycle more matching for the two sets of units. It is always a difficult problem to design the active phase structure with both activity and stability of residue hydrodesulfurization catalysts. Starting with the catalyst preparation process, the effect of the important steps in the preparation process on the structure of active phase was systematically introduced, the regulation mechanism of the active phase structure was summarized, and the method of accurate design of active phase structure of the catalyst with both active and stability from atomic level was pointed out.

Key words: residue, hydrogenation, desulfurization, active phase, structural regulation