Multi-scale modeling and control of fluidized beds for the production of solar grade silicon

Producing Poly-Silicon from Silane in a Fluidized Bed Reactor

“…Commercial software has been used to solve the models mentioned above. FEMLAB solves the partial differential equations by simulating fluidized bed reactors (Balaji et al, 2010). The simulations account for dynamic transport and hydrodynamic phenomena.…”

“…The average particle diameter is then calculated by population balance module and imported into the CFD module to complete model integration. In continuation of the above mentioned works by White et al , Balaji et al (Balaji et al, 2010) presented the complete multi-scale modeling approach including the effect of computational fluid dynamics along with population balance and chemical vapor deposition models. For the first time in the field of silicon production using fluidized beds, they coupled all the effects pertaining to the system (using partial differential equations (CFD), ordinary differential equations (PBM) and algebraic equations (CVD)) and they solved the resulting nonlinear partial differential algebraic equations with a computationally efficient and inexpensive solution methodology.…”

Dynamic Multi-Zone Population Balance Model of Particle Formulation in Fluidized Beds

“…In Hede et al [6] a dynamic heat and mass transfer model for the top-spray batch fluidized bed coating process was presented, which is based on onedimensional discretization of the fluid bed into a number of well mixed vessels. Balaji et al [7] showed results for growth and aggregation of silicon particles in a continuous fluidized bed reactor using population balances in a multi-scale model. The evolution of the PSD during maltodextrin agglomeration in a pilot batch fluidized bed was modelled using PBE by Turchiuli et al [8] obtaining good agreement with experimental data.…”

Novel multiscale simulation environment for modeling of fluidized bed granulation

“…The multiscale models have been previously used in the solids industry for the simulation of different processes, such as drum granulation, fluidized bed reactors [3], paddle mixer-coater [4], fluidized bed agglomeration [5], rotor based granulator [6], general agglomeration model [7], fluidized bed granulation [8], etc. However, no general simulation framework has been developed which will be applicable for different types of solids processes.…”