Computational fluid dynamics modelling of a bench-scale fluidized bed biomass gasifier
Oluwafemi Oyedeji, and N. Abdoulmoumine.  2015.  2016 Annual International Meeting of the American Society of Agricultural and Biological Engineers.

Biomass gasification is one of the foremost chemical conversion technology utilized in renewable energy and liquid transportation fuel production. The complex nature of the process requires the application of numerical analysis tools such as computational fluid dynamics (CFD) to resolve associated practical problems in a fast and cost effective manner. In this study, a transient three dimensional CFD model using Eulerian-Eulerian multiphase approach was employed to simulate biomass gasification in a bench-scale fluidized bed reactor, accounting for particle interactions, heat and mass transfers and chemical reactions. The hydrodynamics of the gasification process and description of particle collisions were simulated by standard κ-ε turbulence model coupled with the kinetic theory of granular flow. The homogeneous and heterogeneous reactions in the gasifier were resolved using conservation laws of mass, momentum, energy, and chemical species. The effects of gasification conditions (temperature: 790 K 1078 K and equivalence ratio: 0.15 0.35) on syngas yield and syngas composition (CO, CO2, CH4, H2, C2H2, and C2H4) were investigated.