Abstract: Increasing the production of light olefins in fluid catalytic cracking (FCC) unit is an effective mean for many refineries to optimize product distribution and enhance economic benefit. It is also one of the critical pathways to transform the refining industry towards the chemical industry.The catalysts and additives for enhancing light olefins production in FCC, along with their technological features, was reviewed over the past two decades both domestically and internationally. The applications of some products in domestic refineries were summarized, aiming to provide references for refineries in selecting suitable products to increase light olefins production. Currently, the technology for enhancing light olefins production is maturing, and the continued optimization of zeolite and matrix properties will be the unchanging theme in the future. Catalyst assembly technology may play a significant role in constructing highly accessible catalysts and additives with hierarchical pores.

Key words: catalytic cracking, light olefin, catalyst, additive, gasoline, octane number, ZSM-5 zeolite