Modeling cat cracker catalyst demetallization

摘要

Vanadium and nickel have been identified as the major poisons that lead to the deactivation of cracking catalysts. These metals can be demetallized by a multistage process involving gas solid non-catalytic reactions in porous parti- cles. Mathematical models for predicting the removal rate of vanadium when diffusion, reaction, and reaction and dif- fusion are controlling have been developed.