Abstract: Environment-friendly multifunctional additive PCA-101 was used in the 2.80 Mt/a catalytic cracking unit of PetroChina Huhhot Petrochemical Company. The results showed that the addition of PCA-101 did not cause pollution to the catalyst in the FCC unit. The antimony content in the equilibrium catalyst was reduced from 2 425 μg/g to 716 μg/g, and the waste catalyst was transformed from the dangerous waste to the solid waste. Moreover, the yield of light liquid increased by 0.49 percentage point, which effectively improved the product distribution. The volume fraction of hydrogen in dry gas decreased from 48.92% to 47.39%, which indicated that PCA-101 had a good effect of inhibiting Ni pollution.

Key words: catalytic cracking, multifunctional additive, antimony, nickel, hydrogen