FLUID BED GASIFICATION.

This paper presents a summary of the work accomplished to date in a three year study conducted for ERDA. General computer models are being developed to provide a theoretical description of gas-solid flows in reactors for coal gasification. Initial applications of these models will be to fluidized bed gasification processes. During the first year of this effort the theoretical formulation of the thermohydrodynamics and chemistry for multi-phase flows in fluidized beds was developed and incorporated into finite difference computer codes. Calculations, with the thermohydrodynamic code, of nonreactive flows in fluidized beds, were compared with experimental measurements and good qualitative and quantitative agreement was demonstrated. A chemistry code was developed and used to model a homogeneous, constant temperature, steady flow gasifier (CO//2 - acceptor process) and good quantitative agreement was obtained between the calculation and pilot plant data. Refs.