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Title	The Simultaneous Drying and Pyrolysis of Single Wood Particles and Pellets Made of Peat
Creator	Saastamoinen, J.; Aho, M.
Publisher	Digitized by J. Willard Marriott Library, University of Utah
Date	1984
Spatial Coverage	Tulsa, Oklahoma
Abstract	The simultaneous drying and pyrolysis of single wood particles and pellets made of biomass are studied both theoretically and experimentally. The combined radiation and convection boundary condition is used in the theoretical model for the particle surface. The model takes into account the transient heat conduction and the effect of the flow of steam and pyrolysis products inside the particle and makes allowances to varying heats of pyrolysis. The local heat conductivity changes with time due to disappearence of matter in the course of drying and pyrolysis. In the model it is assumed that, instead of the Arrhenius type rate equation, the rate of the pyrolysis inside the particle is controlled by the diffusion of heat. Then the local density in the particle is uniquely defined by the local temperature. This dependence of (equilibrium) density on the temperature is found experimentally for different materials by using the thermogravimetric method. The effect of the shape and the initial moisture content of the particle on the rate of the pyrolysis is examined. It is found that by keeping the particle volume/surface area ratio constant, the transient mass/initial mass curves for particles of varying shape nearly coincide. The model is also applicable for particles made of other material with high volatile content.
Type	Text
Format	application/pdf
Language	eng
Rights	This material may be protected by copyright. Permission required for use in any form. For further information please contact the American Flame Research Committee.
Conversion Specifications	Original scanned with Canon EOS-1Ds Mark II, 16.7 megapixel digital camera and saved as 400 ppi uncompressed TIFF, 16 bit depth.
Scanning Technician	Cliodhna Davis
ARK	ark:/87278/s6xk8j29
Setname	uu_afrc
ID	1621
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6xk8j29

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Title	Page 28
Format	application/pdf
OCR Text	Show 2.1.28 LITERATURE 1. A. Murty Kanury and Perry L. Blackshear. Some Considerations Pertaining to the Problem of Wood-Burning. FM Research Corporation. Technical Report. FMRC Serial No.19551.1969 . 2. A.Murty Kanury. Burning of Wood-A Pure Transient Conduction Model. J.Fire & Flammability, Vol.2 (July 1971),p.191 3. Kung, H.,A Mathematiel Model of Wood Pyrolysis. Combustion and Flame 18, 185-195 (1972) 4. Kung, H. & Kalelkar, A., On the Heat of Reaction in Wood Pyrolysis. Combustion and Flame 20. 91-103 (1973) 5. Kansa, E., Perlee, H., Chaiken, R., Mathematical Model of Wood Pyrolysis Including Internal Forced Convection. Combustion and Flame 29,311-324 (1977) 6. Simmons, W. and Ragland K., Single Particle Combustion analysis of Wood. A Paper Presented at the international Conference on Fundamentals of Thermochemical Biomass Conversion. October 1982. YMCS of the Rockies. Estes Park, Colorado. 7. Phillips, A. and Becker, H., Pyrolysis and Burning of Single Sticks of Pine in a Uniform Field of Temperature, Gas Composition, and Gas Velocity. Combustion and Flame 46, 221-251 (1982) 8. Luikov, A.V., Heat and Mass Transfer in Capillary-porous Bodies. Pergamon Press. Oxford 1966. 9. Vovelle,C, Mellottee, H., and Delbourgo, R. , Kinetics of the Thermal Degradation of Cellulose and Wood in Inert and Oxidative Atmospheres. Nineteenth Symposium (International) on Combustion/The Combustion Institute. 1982. pp.797-805. 10. Lee,C.K.,Chaiken,R.F.,and Singer,J.M.,Charring Pyrolysis of Wood in Fires by Laser Simulation. Sixteenth Symposium on Combustion, The Combustion Institute, Pittsburgh,1977,p.1459. 11. Lee, C , and Diehl,J.R., Combustion of Irradiated Dry and Wet Oak. Combustion and Flame 42:123-138 (1981)
Setname	uu_afrc
ID	1619
Reference URL	https://collections.lib.utah.edu/ark:/87278/s6xk8j29/1619