Abstract: SINOPEC Research Institute of Petroleum Processing Co., Ltd. has developed a novel residue fluid catalytic cracking catalyst, Connector P70. This catalyst features abundant meso-macropores, which can significantly enhance the mass transfer and diffusion efficiency of heavy oil macromolecules in the channels, promote rapid desorption of cracking products, and effectively inhibit secondary reactions. Meanwhile, it has excellent heavy metal tolerance capacity, making it suitable for FCC units processing feedstocks with high blending ratio of inferior oil and high metal content. It was industrially applied in a residue FCC unit at PetroChina Harbin Petrochemical Company. The results showed that, with a 50.4% Russian crude blending ratio and increased coking tendency of the FCC feedstock, compared to the baseline, the coke yield decreased from 9.00% to 8.58% (a reduction of 0.42 percentage point), the LPG yield increased by 1.34 percentage points (with propylene and butylene yields increasing by 1.63 percentage points and 0.40 percentage point, respectively), and the combined yield of LPG and gasoline increased by 0.47 percentage point, while the yields of diesel, slurry, and dry gas remained comparable. The meso-macropore structured Connector P70 demonstrates significant advantages in efficient residue conversion, coke selectivity improvement, and targeted production of light olefins, providing an effective solution for residue FCC units and facilitating low-cost refining and high-value product production.

Key words: residue, catalytic cracking, meso-macropore structure, Connector P70 catalyst