Process of coking reaction in fluid catalytic cracking

In this paper,coking reaction in fluid catalytic cracking is summarized from four aspects,including factors affecting coking,influence on catalytic reactions by coke,coking mechanism and coke characterization. Researches show that properties of feedstock,reaction temperature,catalyst type and other factors affect the formation of coke. Coke formation lead to deactivation of catalyst and affect distribution of products. Coke formation from various hydrocarbons must go through the step of aromatics. Coked catalysts can be characterized by multiple methods. XPS and GC-MS have also been used to characterize coke. However,there are still some difficulties to identify specific components of coke. The identification of polycyclic aromatics in coke and how to reduce coke formation on FCC catalyst will be the direction of future research.