Abstract: The cracking reaction performance was investigated for a typical FCC feedstock (TC-M，a hydrotreated vacuum gas oil) and a feed blending different proportions of bio-heavy oil (BHO) using the conventional RFCC catalyst MLC-500 with various catalyst/oil ratio in a fixed fluidized bed. The results showed that the degree of cracking reaction is weakened and the conversion rate is decreased with the increase of the proportions of BHO. For the product selectivity, the product selectivities are improved except LPG. The process condition test indicated that the appropriate catalyst to oil ratio can ensure the proper depth of heavy oil conversion and better product selectivity. Gasoline olefins increase by about 10 percentage points, aromatics decreases, and no obvious RON changes. The oxides in BHO that converted to CO and CO2 are 14.9% and 7.8%, respectively when the mass ratio of catalyst to oil is 6.0 and BHO blending is 15%, the rest of oxides are counted in water. Liquid products (including gasoline, diesel and heavy oil) are essentially free of oxygen.

Key words: biological heavy oil, catalytic cracking, reaction performance, heavy oil conversion