Reside cracking and bulky molecule cracking abilities of RFCC catalysts

Based on reaction chemistry of resid catalytic cracking, it is discussed extensively how several factors including catalyst texture and acidity, matrix activity, crystallite size of zeolites and interaction of matrix with zeolites affect the ability of bulky molecule cracking of RFCC catalysts. In order to crack bulky molecule in residue effectively, RFCC catalysts should have proper pores of different size, different acidities, especially of large percent mesopore with high activities. Active matrices can not only enhance resid cracking abilities, but also improve other performances such as metal resistance, basic nitrogen resistance and SOx or NOx abatement. Additionally, increasing outer surface area of zeolites and making full use of interaction of matrix with zeolites are also two key factors in catalysts design for different RFCC units.