Title:
Properties of Torrefied Pellets Made of Softwood Forestry Residues
Author(s):
Toven, K., Reitan, A., Karlsen, T.
Document(s):
Paper
Abstract:
In Scandinavia, the wood processing industry leaves great amounts of forestry residues in the countryside which is utilized to a limited extend due to high logistics costs. Combined torrefaction and pelletizing is a promising technology for obtaining cost¬ effective bioenergy value¬ chains for bulky feedstocks like forestry residues. The technology is close to commercialization however there are still uncertainties about processing, process control and product quality. The aim of this paper is to explore the suitability of using spruce, forest residue and bark feedstocks for producing torrefied pellets, primarily with respect to pelletizing and product properties. Biomass feedstocks were torrefied in a batch reactor, hammer milled and pelletized in a single pellets press. Pellets processing was evaluated in terms energy requirement for compression and friction energy in the press channel, and the product quality was evaluated in terms of net calorific value, degree of densification in the pelletizing process and pellet strength.
Keywords:
forest residues, solid biofuels, torrefaction, densification
Topic:
R&D on Processes for Solid, Liquid and Gaseous Fuels from Biomass
Subtopic:
Advanced solid biofuels
Event:
20th European Biomass Conference and Exhibition
Session:
3DV.4.12
Pages:
1745 - 1747
ISBN:
978-88-89407-54-7
Paper DOI:
10.5071/20thEUBCE2012-3DV.4.12
Price:
FREE
