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Title:
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Reducing fly ash deposition from a brown coal by solid additives :8th international conference on coal science, 10-15 September
1995, Oviedo, Spain
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Author(s):
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Published by:
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Publication date:
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ECN
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1995
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ECN report number:
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Document type:
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ECN-RX--95-020
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Other
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Number of pages:
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Full text:
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15
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Download PDF
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Abstract:
The paper reports on methods to control sodium based fouling and slaggingof a Victorian brown coal using solid additives. For nine mixtures of oxides
and sodium salts, the reactions of sodium with kaolin, silica, and alumina
were investigated. The results are compared with those seen for combustion of
coal after wet pre-treatment with aluminium compounds. Calculated reaction
rates suggest that sodium in sodium acetate form is most reactive and that
sodium in chloride form is least reactive. Sulphur reduces the extent of
silicate formation. Estimates of additive requirements suggest that kaolin or
alumina (2-3 wt% of coal) with a particle size between 10 and 20 mum would
be effective for controlling fly ash deposition associated with the use of
Victorian brown coals. 3 tabs., 6 refs.
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