(736c) Hybrid Lagrangian-Eulerian Simulation of Biomass Gasification in a Bubbling Fluidized Bed Reactor
In this work, the gas and the bed material are modeled as continuum phases whereas biomass particles are simulated as a discrete phase in Lagrangian domain using Dense Discrete Phase Model. Different drag models were used to accurately estimate the mixing of biomass and bed material. The model predictions were compared with experimental results reported for a pseudo two dimensional fluidized bed. The accuracy of motion of the biomass particles in a bubbling condition was evaluated by comparing mixing index and probability of their presence at different points with experimental results. Moreover, the effect of particle size distribution of biomass particles on gasification was studied. Finally, the results showed that the hybrid model had a good prediction of outlet gas composition.