Properties of Pinus sp. pellets prepared after in-line pre-compaction with torrefaction

Pelletizing and torrefaction increase biomass energy density, generating a more homogeneous fuel with lower moisture, enabling it to burn in equipment high efficiency. This work evaluated the quality of pellets made from wood particles that had been densified torrefied an extruder-type system. Particles Pinus sp. were at 200, 250, 300 °C for six minutes then compacted produce pellets. The physical, chemical, mechanical properties these compared standard ones. Torrefaction modified by increasing ash, fixed carbon, higher heating value, while reducing volatile matter equilibrium moisture content. durability was than defined European, German, American standards. pre-compaction route temperature most efficient energetic use, natura biomass. latter has negative aspects such as great variation size (length diameter) density besides