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 of conversion of coke ash residue in an oxygen-enriched vapor-air mixture, a non-stationary model of solid fuel gasification in a fixed layer is built. This model takes into account an interphase convective heat transfer, radiation-conductive heat transfer of the solid phase, radiant and conductive heat exchange of the layer with the reactor wall, heterogeneous and homogeneous chemical reactions, gravity forces and aerodynamic drag. The proposed model allows to obtain detailed information about the geometric, aerodynamic, thermal and physicochemical parameters of gasification of solid fuel in a fixed bed at different pressures at any time. Bibl. 7, Fig. 1.
Gómes-Barea A. and Leckner B. Modeling of biomass gasification in fluidized bed. Progress Energy Combust. Sci. 2010. 36. pp. 449–509.
Aerov M.E., Todes O.M., Narinskii D.A. Apparaty so statsionarnym zernistym sloem. Gidravlicheskie i teplovye osnovy raboty. [Devices with a stationary granular layer. Hydraulic and thermal basis of work]. Leningrad : Khimiia, 1979, 176 p.
Westbrook C.K. and Dryer F.L. Simplified reaction mechanisms for the oxidation of hydrocarbon fuels in flames. Combust. Sci. Technol. 1981. 27. pp. 31–43.
Ma J. and Zitney S.E. CFD modeling of entrained-flow gasifiers with improved physical and chemical submodels. Energy Fuels. 2012. 26. pp. 7195–7219.
Bustanmante F., Enick R.M., Killmeyer R.P., Howard B.H., Rothenberger K.S., Cugini A.V., Morreale B.D., and Ciocco M.V. Uncatalyzed and wall-catalyzed forward water-gas shift reaction kinetics. AIChE J. 2005. 51. pp. 1440–1454.
Rokhman B. Theoretical investigation of the process of steam–oxygen gasification of coke–ash particles in a fluidized bed under pressure. Journal of Engineering Physics and Thermophysics. 2015. 88 (2). pp. 313–328.
Hobbs Michael L., Radulovic Predrag T., and Smoot L. Douglas. Modeling Fixed-Bed Coal Gasifiers. AIChE J. 1992. 38 (5). зp. 681–702.
Copyright (c) 2022 Energy Technologies & Resource Saving
This work is licensed under a Creative Commons Attribution 4.0 International License.