Anti-deactivation of zeolite catalysts for residue fluid catalytic cracking

Catalytic cracking is one of the most important refining processes used in the petrochemical industry, in which the highly active zeolite catalyst is the key to heavy oil catalytic cracking. However, heavy oil deactivates zeolite catalysts easily, which is not conducive to raw material conversion and quality improvement. With the increase of industrial capacity, the output of spent catalysts is also increasing year by year, which puts forward higher requirements for the catalyst deactivation mechanism and regeneration process. In this paper, the deactivation mechanisms of zeolite catalyst in heavy oil catalytic cracking were clarified, and the anti-deactivation methods of zeolite catalyst, such as modification, structure regulation, use of additives, and machine learning assists in catalyst design were summarized, and the corresponding catalyst regeneration methods were proposed. It is a hot topic to apply the pore classification and nanocrystallization of catalyst, which provides a reference for the application of heavy oil catalytic cracking catalyst.