Modeling of chemical looping combustion process in the coupled reactor

Based on the kinetic theory of granular flow and kinetic reaction models for oxygen carrier, a gas-solid two-phase flow model was developed for chemical looping combustion system. Flow behaviors of particles and reaction characteristics were simulated in the coupled reactors of air reactor (AR) and fuel reactor (FR). The non-uniform core-annular flow structure can be captured through simulations in the AR. The distributions of gas species and temperature were predicted. Instantaneous species mass fraction and solid mass flux distributions at the different locations were also obtained. Fundamental knowledge of multiphase reactive fluid dynamic behavior of the gas-solid flow is essential for the optimization and operation of a coupled reactor for chemical looping combustion process.