Process simulation is an inevitable step in designing chemical plants. While equation oriented approaches suffer from the mathematical complexity, demanding extensive time and computational effort, the sequential approach provides a simple and user-friendly infrastructure in which a sophisticated chemical unit is wisely segmented into sequences of well-known unit operations. In this study, the sequential modular model is introduced to simulate a circulating fluidized bed reactor by integrating the kinetic and hydrodynamic sub-models into logically-ordered ideal chemical reactors through subroutines. The predictions of the proposed model well represent the experimental data reported in literature. Flexibility and performance of our model provides a reliable tool for predicting the behaviour of the complex non-ideal reactor.