MATHEMATICAL MODELING AND NUMERICAL STUDY OF BIOMASS FIXED CARBON GASIFICATION IN A DENSE BED AT ATMOSPHERIC PRESSURE. PART 1. THEORETICAL DESCRIPTION OF COKE PARTICLES CONVERSION IN A FIXED BED

Based on a system of parabolic equations describing the process conversion coke ash residue in an oxygen-enriched vapor-air mixture, non-stationary model solid fuel gasification fixed layer is built. This takes into account interphase convective heat transfer, radiation-conductive transfer phase, radiant and conductive exchange with reactor wall, heterogeneous homogeneous chemical reactions, gravity forces aerodynamic drag. The proposed allows to obtain detailed information about geometric, aerodynamic, thermal physicochemical parameters bed at different pressures any time. Bibl. 7, Fig. 1.