Effect of blending heavy aromatics on diesel hydrocracking unit
The effects of blending heavy aromatics on process parameters and product quality were in-vestigated with the mixed oil of straight run diesel,catalytic diesel,slurry bed diesel and heavy aromat-ics as raw materials in the 3.5xl06 t/a diesel hydroc-racking unit of Zhejiang Petroleum & Chemical Co Ltd.The results showed that after blending the heavy aromatics,the content of polycyclic aromatic hydro-carbons in the mixed raw oil and the reaction hydro-gen consumption were increased,and the tempera-ture rise of the refining bed of the 1-stage hydro-genation reactor(R-1001)increased significantly.When the blending ratio of heavy aromatics(mass fraction of raw oil)was 5.0％,the R-1001 cracking bed temperature and hydrogen consumption fluctu-ated greatly,and the reaction conversion rate was 91.0％,and the aromatization index of the product heavy naphtha increased by 5.39 percentage points.
hydrocrackingcatalytic diesel oilstraight run diesel oilslurry bed diesel oilheavy aromaticspolycyclic aromatic hydrocarbonsheavy naphtha
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