Analysis of the influence of blending hydrogenated tail oil in catalytic cracking unit on product distribution.

This paper takes the catalytic cracking unit of a petrochemical industry as an example to explore the effects of blending hydrogenated tail oil on the distribution and quality of catalytic cracking products, and analyzes the reasons. The results showed that blending hydrogenated tail oil can significantly reduce the output of dry gas and oil slurry. Every increase of 1 ton of hydrogenated tail oil refining, the output of oil slurry decreases by 0.14 tons, dry gas decreases by 56 m³, and gasoline output increases by 0.26 tons. The blending of hydrogenated tail oil will reduce the aromatic hydrocarbon content in gasoline components, decrease the density of gasoline components, and lower the distillation temperature. As the blending amount of hydrogenated tail oil increases, the C₃ content in the liquefied petroleum gas decreases and the C₄ content increases . This is attributed to the fact that the blending of hydrogenated tail oil inhibits the deep reaction of catalytic cracking, reduces the generation of C₃ and below components and deep cracking products such as slurry, and increases the yield of liquids above C₄. As the blending amount of hydrogenated tail oil increases, C₃ and C₄ components become the boundary line for the impact of hydrogenated tail oil blending on the depth of catalytic cracking reaction. [ABSTRACT FROM AUTHOR]