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Show -15- 8. H. Kobayashi, J. B. Howard, and A. F. Sarofin, "Coal Devolatilization at High Temperatures," Proceedings of the 16th International Combustion Symposium, p. 411 (1977). The Combustion Institute. 9. S. K. Ubhayakar, D. B. Stickler, C. W. Von Rosenberg, Jr., and R. E. Gannon, "Rapid Devolatilization of Pulverized Coal in Hot Combustion Gases," Proceedings of the 16th International Combustion Symposium, p. 427 (1977). The Combustion Institute. 10. S. K. Ubhayakar, D. B. Stickler, and R. E. Gannon, "Modelling of Entrained Bed Pulverized Coal Gasifiers," Fuel _56, 281 (1977). 11. D. I. Cliff, K. R. Doolan, J. C. Mackie, and R. J. Tyler, "Products from Rapid Heating of a Brown Coal in the Temperature Range 400-2300°C," Fuel ^3, 394 (1984). 12. K. E. Chung and I. B. Goldberg, "Relation of the Chemical Structure of Coal to its Hydropyrolysis," Fuel 63^, 482 (1984). 13. J. Desypris, P. Murdoch, and A. Williams, "Investigation of the Flash Pyrol-ysis of Some Coals," Fuel _61_, 807 (1982). 14. F. D. Skinner and L. D. Smoot, "Heterogeneous Reactions of Char and Carbon," in Pulverized Coal Combustion and Gasification, op cit. 15. C. T. Crowe, "Gas-Particle Flow," in Pulverized Coal Combustion and Gasification, op cit. 16. C. K. Westbrook and F. L. Dryer, "Simplified Reaction Mechanisms for the Oxidation of Hydrocarbon Fuels in Flames," Combustion Sci. and Tech. _27^ 31 (1981). 17. N. R. Soelberg, "Local Measurements in an Entrained Flow Gasifier," Thesis, Chemical Engineering Department, Brigham Young University (1983). FIGURE CAPTIONS Fig. 1. Computation mesh. The left boundary is an axis of symmetry, while the top and right boundaries are rigid walls. The bottom boundary is a constant pressure outflow boundary. Fluid and coal particles are injected through the primary and secondary nozzles at the top left corner of the mesh. Fig. 2. Velocity vector plot at time 13.9 ms. All of the plots are at this time. Fig. 3. Particle plot. Each dot represents a parcel of uniform size coal particles, but the particle size distribution among the parcels corresponds to a measured distribution. Fig. 4. Contour plot of specific internal energy. The highest and lowest contour values are indicated by the H and L labels on all of the contour plots. H = 4.7 x 10 and L = 6.9 x 109 cm2/s2. |