As the circulation volume of hydrocracking tail oil increases, what changes occur in the molecular structure of the various products?
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As the circulation volume of hydrocracking tail oil increases, what changes occur in the molecular structure of the various products? For example, does the composition of alkanes and aromatics in the tail oil increase or decrease?
Is it a full circulation process for the tail oil? If it is a full circulation process, the amount of tail oil that circulates increases, and heavy components accumulate in the tail oil; as a result, the tail oil turns red in color and flocculent precipitates form. Polycyclic aromatic hydrocarbons also accumulate in the tail oil.