Abstract
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.
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Valmari, T., Kauppinen, E.I., Lind, T., Kurkela, M., Moilanen, A., Zilliacus, R. (1996). Studies on Ash Species Release during the Pyrolysis of Solid Fuels with a Heated Grid Reactor. In: Baxter, L., DeSollar, R. (eds) Applications of Advanced Technology to Ash-Related Problems in Boilers. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9223-2_17
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DOI: https://doi.org/10.1007/978-1-4757-9223-2_17
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