(592b) CFD Simulation of CO2 Sorption Using Circulating Fluidized Bed System

Emission of carbon dioxide, as a main greenhouse gas directed policy makers' attention, and consequently research efforts, toward developing novel and efficient technologies for CO2 separation and sequestration. Removal of CO2 from flue gases of coal based power plants which generate about 50 percent of the today's United States electric power is a challenging process due to its low pressure and low concentration of CO2. Recent experimental studies have shown that alkaline based solid could be a promising sorbent for efficient CO2 removal from flue gases. To scale up these laboratory or bench scale experiments, a state of the art design tool such as CFD simulation is needed. This paper will focus on CFD simulation of gas-solid flow in the riser section (sorption process) of a circulating fluidized bed using deactivation kinetic model. Our simulation results will be compared with experimental data of KIER for continuous CO2 sorption using a circulating fluidized bed system.