Modeling and simulation of selected fluidized bed processes based on the two-phase theory of fluidization

Theoretical models based on the two-phase theory of fluidization were developed to simulate selected fluidized bed processes. The three developed models were: (1) An isothermal grid-enhanced two-phase model for simulating silicon fines generation in a fluidized bed silane-silicon reactor; (2) A non-isothermal model for simulating the same silane reaction process as described in model 1; and (3) A heat transfer model for simulating bed temperature profiles in a shallow gas-solid fluidized bed waste heat boiler involving cooling devices.;The developed models were composed of material and energy balance equations for bubble gas, emulsion gas, emulsion particles, and wake particles coupled with the associated fluidized bed hydrodynamics, heat transfer and reaction kinetics equations. The simulation results were compared with experimental and/or literature available data.