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Advisor(s)
Abstract(s)
Pelletizing and torrefaction increase biomass energy density, generating
a more homogeneous fuel with lower moisture, enabling it to burn in
equipment with high energy efficiency. This work evaluated the quality of
pellets made from wood particles that had been densified and torrefied in
an extruder-type system. Particles of the Pinus sp. wood were torrefied at
200, 250, and 300 °C for six minutes and then compacted to produce
pellets. The physical, chemical, and mechanical properties of these pellets
were evaluated and compared with standard ones. Torrefaction modified
the pellets properties by increasing ash, fixed carbon, higher heating
value, and the energy density, while reducing the volatile matter and
equilibrium moisture content. The mechanical durability of the pellets was
lower than that defined by the European, German, and American
standards. The torrefaction pre-compaction route with torrefied particles at
a temperature of 300 °C was the most efficient for energetic use,
compared to the in natura biomass. The latter has negative aspects such
as great variation in size (length and diameter) and density besides high
moisture content
Description
Keywords
biofuel compaction energy heat treatment pelletizing
Pedagogical Context
Citation
Lima, L. V. L., de Castro, V. R., Surdi, P. G., Zanuncio, A. J. V., Zanuncio, J. C., Carneiro, A. C. O., Gominho, J., and Araújo, S. O. (2023). “Properties of Pinus sp. pellets prepared after in-line pre-compaction with torrefaction,” BioResources 18(2), 3440-3451.
Publisher
Bioresources