关键词: 重油, 催化裂化, 操作条件, 烯烃, 辛烷值, 助剂

Abstract: The effect of adding LBO-A, an additive for octane improvement and olefin reduction, on the catalytic cracking reactions was investigated on a small fixed-fluidized bed reactor using equilibrium catalyst from the 2# FCC unit of Huabei Petrochemical Company as main catalyst and Daqing atmospheric residue as feedstock under the conditions of a reaction temperature range of 480~490℃, a catalyst to oil mass ratio of 6 and a WHSV of 20 h-1. Test results showed that with the increase of LBO-A dosage in the catalyst inventory, the heavy oil conversion reduced, the gasoline yield and total liquid yield decreased, yet the aromatic content in gasoline increased. An optimum product distribution was obtained at the LBO-A added dosage of 10%, the olefin content of gasoline was less than 20% and the aromatic content of gasoline was increased by 4.2 percentage points.

Key words: heavy oil, catalytic cracking reaction, operating condition, olefin, octane number, additive