助剂LBO-A加入量对大庆常压渣油催化裂化反应的影响

在小型固定流化床实验装置上，以大庆常压渣油为原料，采用华北石化公司第Ⅱ套催化裂化装置的平衡剂为催化剂，在反应温度480～490 ℃、剂油质量比为6、空速为20 h-1的条件下，考察加入助剂LBO-A对催化裂化反应的影响。结果表明，随助剂LBO-A加入量的增加，重油裂化能力降低，汽油收率和液体收率减少，但汽油中芳烃含量增加；当助剂LBO-A加入量为10％时，催化裂化产品分布较合理，汽油中烯烃质量分数降低到20%以下，汽油中芳烃含量增加4.2个百分点。

INFLUENCE OF LBO-A ADDITIVE DOSAGE ON THE CATALYTIC CRACKING REACTIONS OF DAQING ATMOSPHERIC RESIDUE

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.