Iron Contamination Mechanism and Reaction Performance Research on FCC Catalyst

摘要: FCC (Fluid Catalytic Cracking) catalyst iron poisoning would not only influence units’ product slate; when the is serious, it could also jeopardize catalysts’ fluidization in reaction-regeneration system and further cause bad influences on stable operation. Under catalytic cracking reaction conditions, large amount of nanonodules formed seriously contaminated due to exothermic reaction. These nodules intensify attrition between particles generate plenty fines which severely smooth running. A dense layer be surface after contamination stops reactants diffuse inner structures catalyst. This causes extremely negative effects catalyst’s heavy oil conversion ability greatly cut down gasoline yield while increasing yields dry gas, coke, slurry largely. Research shows that performance deteriorated content E-cat (equilibrium catalyst) exceeds 8000 μg/g.