Abstract: A set of in-situ microreaction visualization research systems for deep catalytic cracking has been established to address the phenomenon of catalyst particle agglomeration in the riser reactor of fluid catalytic cracking. Using a high-temperature stage microscope, the influence of catalyst arrangement on the product distribution of isobutene catalytic cracking reactions under different reaction temperatures, feed rates, and catalyst particle sizes were examined. The study indicates that increasing the reaction temperature or the feed rate of reaction can mitigate the effects of catalyst agglomeration on the conversion. The influence of the particle size of the catalyst on the deep catalytic cracking reaction is related to agglomeration of catalyst and zeolite types, affecting the contact between the feedstock and the catalyst, as well as the diffusion of products, thereby influencing the reaction outcomes.

Key words: deep catalytic cracking, catalyst aggregation, reaction conversation