Mechanistic Insights into the Interaction between Binders and Y-Type Zeolites in Fluid Catalytic Cracking

Abstract

Binders plays an essential role in fluid catalytic cracking catalysts, and its interaction mechanism with zeolites remains to be explored. The effects of three binders on REUSY zeolite were investigated. Aluminum sol most notably blocked the pore channels and destructed the framework of zeolite by removing the framework Al. Silica sol diffused into the silicon hydroxyl nests and form new SiO4 , which enhanced structural stability and increased the number of Bronsted acid sites of zeolite, rendering the sample better hydrothermal stability and higher micro-reaction activity. The influence of the colloidal sol of pseudo boehmite on zeolite was between the two.

Keywords: binders, Y-type zeolites, fluid catalytic cracking, interaction mechanism