Title:
Simultaneous Thermal Analysis as a Method for Prediction of Biomass Ash Thermal and Melting Behavior
Author(s):
Dibdiakova, J., Wang, L., Horn, H.
Document(s):
Paper
Poster
Abstract:
Characterization of biomass ash melting and thermal behavior is crucial to prevent and reduce ash related problems in biomass-fired boilers. In present work, ash melting behaviours of spruce saw dust and bark were investigated by simultaneous thermal analysis (STA). The decomposition stages of sawdust and bark biomass were characterized by four peaks, respectively. The four peaks are the first relatively small one at temperatures about 317-341 ºC, a second large peak at 419-451 ºC, a small third peak at 860-1000 ºC and a small endothermic peak at 1290-1400 ºC. DSC curves of bark sample at both heating rates were shifted towards lower temperatures than DSC curves of sawdust fuels. On average, the degradation process starts 5 ºC earlier and the second exothermic peaks in both heating rates are found even 20 ºC earlier. The remaining residue of bark samples was approximately two times higher than that of sawdust. The ignition temperatures of both spruce and pine bark were slightly shifted to higher temperatures compared to those of spruce and pine sawdust samples. STA experiments of exanimated biomass fuels indicated that their critical melting temperatures lie in the range of 860-1000 ºC. The information obtained in this study qualifies the STA method as a suitable and rather simple method for the determination of ash melting and thermal behavior of woody biomass.
Keywords:
ash melting behaviour, forest biofuels, simultaneous thermal analysis (STA), differential scanning calorimetry (DSC)
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Biomass and bioliquids combustion for small and medium scale applications
Event:
24th European Biomass Conference and Exhibition
Session:
2BV.1.42
Pages:
733 - 737
ISBN:
978-88-89407-165
Paper DOI:
10.5071/24thEUBCE2016-2BV.1.42
Price:
FREE
