Title:
Fuel Quality, Dry Matter Losses and Combustion Behaviour of Anaerobically Stored Wood Chips
Author(s):
Kuptz, D., Lesche, S., Mack, R., Rist, E., Schön, C., Hartmann, H.
Document(s):
Paper
Slide presentation
Abstract:
Anaerobic storage of wood chips from forest residues and from short rotation coppice was investigated regarding dry matter losses and fuel quality changes using three approaches, i.e. small storage container (including greenhouse gas (GHG) measurements), small-scale silos of 2 m3 volume and a small wood chip pile (12 m3). After storage, selected wood chip samples were combusted in a 30 kW wood chip boiler and relevant emissions (CO, NOX, particles) were measured. Container trials allowed for best anaerobic conditions reducing dry matter losses to a minimum of 2 w-% after 5 months of storage. Silos proved not to be completely air tight as moisture content increased by 4.2 to 10.4 w-% due to precipitation and distinct dry matter losses were recorded. Still, dry matter losses were lower in silo trials compared to storage in a pile. During combustion, CO and particle emissions increased in naturally stored materials compared to technically dried fuels, probably due to changes in their woody structure but also due to an increase in chemical elements such as potassium. In conclusion, anaerobic storage seems to be an interesting option to reduce dry matter losses. Future studies should focus on the applicability of this technique under practical conditions (e.g. in large driving silos) and on further combustion trials.
Keywords:
combustion, quality, storage, wood chips, dry matter
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Production and supply of solid fuels and intermediates
Event:
27th European Biomass Conference and Exhibition
Session:
2DO.7.4
Pages:
630 - 636
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-2DO.7.4
Price:
FREE
