Hydrocatalytic light diesel oil refining in heavy oil fluid catalytic cracking unit
The operation of 1.4 Mt/a heavy oil fluid catalytic cracking unit of Daqing Petrochemical Company,PetroChina,after refining hydrocatalytic light cycle oil(LCO)was introduced.The results showed that when the hydrocatalytic LCO was refined in the heavy oil catalytic cracking unit,the raw ma-terials showed the trend of lightening in terms of den-sity and distillation range.With the increase of the hydrocatalytic LCO blending ratio,the outlet tem-perature of the riser decreased from 514 ℃ to 509 ℃,the pressure of the reactor increased from 0.192 MPa to 0.207 MPa,the dry gas yield decreased from 3.3％to 2.6％,liquefied petroleum gas yield decreased from 21.0％to 18.2％,gasoline yield decreased from 43.8％to 40.1％,and light cycle oil yield increased from 14.4％to 24.1％.The volume fraction of aromat-ics in stable gasoline showed little change,while the volume fraction of olefins showed the rapid decrease,and the density of light cycle oil also decreased.The ratio of diesel to gasoline in the plant decreased from 0.89 to 0.80.
heavy oilfluid catalytic crackingMIP-CGPcatalytic light cycle oilrefinegasolineolefin
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