The Study Of FCC Catalyst In-situ Crystallized With Meso-macro-pores

It is focused on the research of pore size controlling technology of FCC catalysts since the crude oil become heavier and poorer. The key technology is preparing catalyst with meso-macropore distribution.In in-situ crystallization process, the impacts of the species and amount of binder and pore enlargement agent on FCC catalyst pore size distribution were investigated. The purpose of this study was preparing FCC catalysts in-situ crystallized with abundant meso-macropore. The results showed that the effects of improving pore structure were influenced by the dosage of sodium silicate binder. The greater the amount of sodium silicate, the more mesopore existed in FCC catalyst. The optimal dosage was 10%(by the quantity ratio of SiO2 in sodium silicate to kaolin). Proper amount binder B mixed with sodium silicate as binder could improve the pore volume and mesopore volume of FCC catalyst. The best weight ratio of binder B to sodium silicate was 1.1. Starch and poly propylene glycol as pore enlargement agent were useless in in-situ crystallization. Combustible E as pore enlargement agent enriched meso-macropore distribution. The better dosage is 12.5%.