Journal
ENERGY & FUELS
Volume 25, Issue 4, Pages 1521-1528Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ef101683s
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Funding
- Natural Science and Engineering Council of Canada
- Wood Pellet Association of Canada
- British Columbia Ministry of Forest and Range
- Agricultural Biorefining Innovative Network
- Oak Ridge National Laboratory
- Office of Biomass Program
- United States Department of Energy
- University of British Columbia
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Ground softwood Douglas for (Pseudotsuga menziesii) was treated with pressurized saturated steam at 200-220 degrees C (1.6.-2.4 MPa) for 5-10 min in a sealed container. The contents of the container were released to the atmosphere for a sudden decompression. The steam-exploded wood particles were dried to 10% moisture content and pelletized in a single-piston-cylinder system. The pellets were characterized for,their mechanical strength, chemical, composition, and moisture sorption. The steam-treated wood required 12-81% more energy to compact into pellets than the untreated wood. Pellets made from steam-treated wood had a breaking strength 1.4-3.3 times the strength of pellets made from untreated wood. Steam-treated pellets had a reduced equilibrium moisture content of 2-4% and, a reduced expansion after pelletization. There was a slight increase in the high heating value from 18.94 to 20.09 MJ/kg for the treated samples. Steam-treated pellets' exhibited a higher lengthwise rigidity compared to untreated pellets.
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