Kinetic study of catalytic cracking of heavy oil over an in-situ crystallized FCC catalyst

Abstract

The kinetic characteristics of an in-situ crystallized FCC catalyst were reported for the first time. A six-lump kinetic model containing 24 kinetic parameters, one parameter for basic nitrogen poisoning, another parameter for aromatics adsorption and other two parameters for catalyst deactivation was established. Kinetic parameters were estimated based on experimental data at 460, 480, 500 and 520°С by fourth order Runge–Kutta algorithm and the least square method. Frequency factors and apparent activation energies were then calculated according to Arrhenius equation. The predicted data of product distribution showed good agreement with experimental data, and the relative errors were mainly within 10%. Model analysis indicated that a relative low temperature was more suitable for the production of light oil.