关键词: 渣油加氢, 原料油, 稳定性试验, 反应温度, 残炭, 硫含量, 金属含量, 脱沥青油

Abstract: In order to meet the actual demand of a refinery for processing inferior residue feedstock, and to ensure long-term and stable operation of residue hydrotreating unit, the stability test of residue hydrotreating and feedstock optimization test with different catalyst grading systems are conducted. The stability test results show that: the optimized catalyst gradation can meet the demand of 150 days running, and the removal rate of various impurities can meet the requirements of technical indicators. Compared with the grading of conventional residue hydrogenation catalyst, the catalyst can process high metal, high carbon and low-quality residue, increase the proportion of protective agent and demetallizing agent, the overall activity of the catalyst system is not significantly reduced, the impurity removal effect is better, and the bed temperature rise is easier to control. The results of feedstock optimization test show that: for the inferior residue, the higher the blending ratio of deasphalting oil, the better the reaction performance; when the blending ratio reaches 40%, the residual carbon value of the product in the whole operation cycle can meet the actual production requirements of the unit while meeting the service life requirements of the catalyst.

Key words: residue hydrotreating, feedstock, stability test, reaction temperature, CCR, sulfur content, metal content, DAO