Community Research and Development Information Service - CORDIS

Procedures to determine carbon burnout and fly ash quality

A small-scale test has been developed for the a priori, low-cost screening of potential fuels with respect to their impact on the flash produced when co-fired with coal. Economic considerations with respect to the potential of a secondary fuel should include, in addition to fuel price, the impact it may have on the economic value of any residues produced.

Since the quality of a fly ash can only be evaluated once it has been produced, reliable economic considerations can be made only after a large-scale conformity test. A small-scale test would allow for a much wider screening of potential fuel candidates against low cost. And, in addition, various fuel blends can be tested easily in an attempt to identify the ‘better’ fuel combinations.

A small-scale combustion facility was modified to deliver relevant fly ash samples for subsequent off-line analysis and testing. The test addresses criteria as laid down in a Dutch guideline CUR 70 (later replaced by CUR 83 and 94) which follows EN-450 for the application of fly ash in concrete and has additional criteria when the fly ash is produced by co-firing of biomass.

Reported by

Energy research Centre of the Netherlands
3 Westerduinweg 3
1755 ZG Petten
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