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Torrefied pellets are created through a process called torrefaction. First, the biomass is roasted, ground, and afterward pelletized.
Torrefaction is a thermal process that converts biomass into a coal-like material with superior fuel characteristics to the original biomass. Torrefied biomass is more brittle, making grinding easier and less energy-intensive. Compared to fresh biomass, storage of the torrefied material can be substantially simplified since biological degradation and water uptake is minimized.
Torrefaction involves heating biomass in the absence of oxygen to a temperature of typically about 300° C. The structure of the biomass changes in such a way that the material becomes brittle, and more hydrophobic. Although the weight loss is about 30%, the energy loss is only 10%. The main end-product is the solid, torrefied biomass. During the torrefaction process, combustible gas is released, which is utilized to provide heat to the process.
Using a unmerchantable roundwood, thinnings, harvest residues, bark, wheat straw, cornstalks, or similar products, torrefaction plants can produce an infinite amount of clean, renewable energy. These plants can produce fuel with consistent high quality, and are able to produce at a cost that can compete with fossil fuels in terms of prices, thereby giving a clean, cost-effective alternative to burn.
With this process, we can capture so much CO2 from the atmosphere that we can reverse global warming with a natural and profitable form of carbon capture.
Torrefied pellets could be interesting for several reasons.
Our torrefied pellets: