Enviva Wood Pellets

Enviva Wood PelletsDescription

Enviva Wood Pellets are energy dense, low moisture, uniformly-sized wood fuels.

Production

Enviva wood pellets are made of:

  • Low-grade wood fiber:  Wood that is unsuitable for, or rejected by the sawmilling and lumber industries because of small size, defects (e.g. crooked, knotty, etc.), disease, or pest-infestation;
  • Tops and limbs:  The parts of trees that cannot be processed into lumber;
  • Commercial thinnings:  Harvests that promote the growth of higher value timber by removing weaker or deformed trees to reduce competition for water, nutrients, and sunlight; and
  • Mill residues:  Chips, sawdust, and other wood industry by-products.

The wood is milled, dried and pelletized in a specialty press. During the extrusion process, the lignin in the wood plasticizes forming a natural “glue” that holds the pellet together after production.

Product Applications

  • Co-firing in pulverized coal and fluidized bed energy plants
  • Biomass energy plants
  • Combined heat and power plants
  • Industrial-scale public and private heating

Benefits

  • Low carbon
  • Energy dense
  • Easy to store and transport
  • Efficient, reliable, and scalable combustion

Additional Benefits of Wood Pellets

As an energy-dense, uniform fuel made from high-quality wood materials, wood pellets offer a range of advantages:

  • Wood pellets are efficient as a source of energy—they are reliable and available 24 hours a day, 7 days a week.
  • On an energy content basis, wood pellets have significantly lower SOx emissions than fossil fuels and unprocessed woody materials.
  • Typically, wood pellets have a calorific value of about 17.5 MJ/KG vs. 10.9 MJ/KG for non-pelleted, non-dried wood.
  • With a very low-moisture content (5–7 percent vs. 40–60 percent for non-pelleted wood) and low ash (1–2 percent vs. 5 percent for non-pelleted wood) wood pellets ship in standard dry bulk vessels. This maximizes economic efficiency and is environmentally preferable because such vessels can be used to ship freight on the return trip as well.
  • Wood pellets are uniform and homogenous, making them easily transported.