Methods:Ca 2+ regulating activity test model was set up, the samples screened out were assayed with inhibition activity on LTA(lipoteichoic acid) synthesis.

For FCC resid processing, USY zeolite is perferred because of its superior hydrothermal stability, vanadium resistance and coke selectivity compared to conventional zeolites.

Effects of vanadium poisoning on molecular sieves and catalysts were studied and a high-activity solid vanadium-resistant additive for fluid catalytic cracking was prepared.