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Assessment of Potential Impacts of Peach Kernels and Cardoon as Co-Firing Fuels with Lignite Through Experiments on Reactivity and Ash Behavior

Author(s):

Despina Vamvuka*, Christos Avgoustidis, Antonios Stratakis and George Alevizos   Pages 1 - 13 ( 13 )

Abstract:


Objective: The reactivity and combustion performance of mixtures of lignite with peach kernel and cardoon were investigated, through thermal analysis experiments, for assessing the potential impacts of these wastes as co-firing fuels.

Methods: Additionally, a control method was applied to reduce problematic elements from biomass ashes in order to mitigate deposition phenomena in co-firing units. The results showed that combustion performance of raw fuels followed the order cardoon>peach kernel>lignite, however in case of blends, this order was reversed lignite/peach kernel> lignite/cardoon, revealing synergistic effects between component fuels.

Results: The combustion performance of lignite was improved by blending it with biomass fuels. Deposition problems should be expected in boilers firing peach kernel and cardoon fuels above 900oC.

Conclusion: After alkalis leaching, the reactivity and efficiency of woody materials and mixtures with lignite were enhanced, while the slagging/fouling propensity was reduced.

Keywords:

Combustion, lignite, biomass, blends, slagging/fouling

Affiliation:

Department of Mineral Resources Engineering, Technical University of Crete, Department of Mineral Resources Engineering, Technical University of Crete, Department of Mineral Resources Engineering, Technical University of Crete, Department of Mineral Resources Engineering, Technical University of Crete



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