Studies on Ash Species Release during the Pyrolysis of Solid Fuels with a Heated Grid Reactor
The release of alkalis (sodium and potassium) and five ash matrix elements (silicon, aluminium, iron, calcium and magnesium) during the pyrolysis of Polish coal, Pittsburgh #8 coal, peat and two wood chips was studied with a heated grid reactor using heating conditions relevant to fluidised bed combustion and gasification. Mineral particles or any other super micron fragments were found not to be released from any of the fuels during the pyrolysis. Less than 5 % of any of the elements studied were released from the fuels, with an exception of iron from wood chips. Some iron may have been released from the wood chips (less than 14 % from whole tree chips and less than 8 % from wood chips fuel fraction). Less than 1 % of iron was released from coals and peat.
KeywordsWood Chip Bituminous Coal Fuel Particle Fuel Sample Pyrolysis Experiment
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- Berner, A. (1984). “Design Principles of AERAS Low Pressure Impactor.” In Liu, B.Y.H., Pui, D.Y.H., Fissan H.J. (Eds.), Aerosols: Science, Technology and Industrial Applications of Airborne Particles. New York: Elsevier.Google Scholar
- Helble, J.J., Bool, L.E., Sarofim, A.F., Zeng, T., Peterson T.W., Gallien, D., Huffman, G.P., Huggins, F.E. and Shah. N. (1994). Fundamental Study of Ash Formation and Deposition: Effect of Reducing Stoichiometry. Quarterly Report No. 3. U.S. Department of Energy, DOE Contract No. DE-AC22–93PC92190.Google Scholar
- Kahata-Pendias, A. and Pendias, H. (1984). Trace elements in soils and plants. CRC Press, Inc., Boca Raton, Florida.Google Scholar
- Kurki, M. (1982). “Main chemical characteristics of peat soils. Peatlands and their utilization in Finland.” Finnish Peatland Society–Finnish National Committee of the International Peat Society, Helsinki, 37–41.Google Scholar
- Lind, T., Kauppinen, E., Jokiniemi, J.K., Maenhaut, W. and Pakkanen T. (1994). “Alkali metal behaviour in atmospheric circulating fluidised bed coal combustion.” In J. Williamson and F. Wigley (Eds.) “The Impact of Ash Deposition on Coal Fired Plants” Proceedings of the Engineering Foundation Conference, Taylor and Francis, 77–88.Google Scholar
- Lind, T., Kauppinen, E., Maenhaut, W., Shah, A., and Huggins, F. (1995). “Ash vaporization in circulating fluidized bed coal combustion.” Accepted for publication in Aerosol Science and Technology.Google Scholar
- McKeough, P., Pyykkönen, M. and Arpiainen, V. (1995). “Rapid Pyrolysis of Kraft Black Liquor. Part 2. Release of Sodium.” Paperi ja Puu-Paper and Timber 77, 39: 44.Google Scholar
- Mengel, K. and Kirkby, E. A. (1987). Principles of plant nutrition. 4th Ed., International Potash Institute, Bern.Google Scholar
- Raask, E. (1985). Mineral Impurities in Coal Combustion. Washington: Hemisphere Publishing Corporation.Google Scholar