Wood pellet, water content

Wood pellet is densified biofuel made from pulverised woody biomass with or without additives usually with a cylindrical form, random length and typically 5 to 40 mm, with broken ends.

The EN 14961-2 norm "Solid biofuels - Fuel specifications and classes - Part 2: Wood pellets for non-industrial use" determines the fuel quality classes and specifications of wood pellets for non industrial use.

Wood pellets are produced from the following raw materials:

• forest, plantation and other virgin wood;
• by-products and residues from wood processing industry;
• used wood. Provided used woods do not contain heavy metals or halogenated organic compounds as a result of treatment with wood preservative or coating.

• Demolition wood, defined as "used wood arising from demolition of buildings or civil engineering installations" (FprEN 14588:2010,4.52).
• Torrefied pellets. Torrefaction is a mild pre-treatment of biomass at a temperature between 200-300 °C.