Abstract: In view of the fact that the carbon emission from the catalytic cracking mainly comes from the regeneration process and the poor carbon atom economy caused by the high yield of coke, the technical ideas of optimizing the properties of FCC feedstock and improving the whole conversion rate at the fast rising point of coke yield were put forward. A new fluid catalytic cracking process with low coke yield and high liquid product yield was developed, and according to the different target products, two technical schemes of ① producing more fuel oil, gasoline and ② producing more propylene, butene and marine fuel oil were formed. The results showed that the coke yield decreased by 39.52% by using macroporous Y zeolite (CGP-1 catalyst) to produce more marine fuel oil and gasoline after optimizing the raw material properties by solvent deasphalting, the yield of liquid product increased by 5.84 percentage points. The yield of coke using the mesoporous MFI zeolite (TCC-1 catalyst) for increasing the yield of propylene, butene and fuel oil components decreased by 80.05%, and the yield of liquid products increased by 12.22 percentage points.

Key words: catalytic cracking, low coke yield, high liquid product yield, solvent deasphalting, conversion rate