Fuel Logs

Fuel Logs

Burns hot and clean - Better than wood


OMTEC produces Fuel Logs using biomass such as wheat straw. Fuel Logs can be used in automatic space heating applications, or for home heating.

Fuel Pucks are compressed blocks made from wheat straw dust under high pressure with a natural ligno-based binder. Bonding takes place under high pressure inside the press as the lignin fuses. The result is an ecologically clean fuel with heat values exceeding traditional fuel in calorific content.

Fuel Pucks are manufactured in several stages:

  • milling with a hammermill to reduce the particle size
  • mixing with binder (optional)
  • adding steam to release and activate natural binders [1]
  • pressing (using a Briquetting Machine)
  • curing
  • packaging


  • heating (industrial space heating)
  • steam generation for heat, or electrical production via steam turbines


  • made with wheat straw and natural binder
  • 3" cylindrical format
  • 6000 BTU/lb
  • pucks are resilient to moisture [1]
  • moisture content of 7%-15%, compared to green feedstock of up to 50%
  • puck density is about 30-40 lb/ft3 (480-640 kg/m3, 8.6-12.0 GJ/m3) [1]
  • compatible with multi-fuel furnaces


  • Agrofuel are a carbon-neutral fuel, unlike traditional heating oil or coal which carry carbon-debits
  • raw materials for producing Agrofuel are a renewable natural resource
  • briquetting is well known in Europe, and has been in use for more than 50 years, both in consumer and industrial co-firing and district heat plants [2]
  • Wheat Straw Fuel Puck Property Notes
    low bulk density of unprocessed biomass when compressed, biomass has an economical radius of 200km [1]
    ash content wheat straw has an ash content of 4-10 wt-%, compared to 10 wt-% for coal, and < 1 wt-% for wood [4]
    clinking wheat straw has 3-8 wt-% silica (SiO2) which can create deposits which reduce heat transfer and increase slag formation. By minimizing chlorline (Cl) and potassium (K), this effect can be minimized.
    Sulfur (S) Wheat Straw has less sulfur than coal
    Chlorine (Cl) 6-3.5 wt-%. Wheat Straw has more chlorine than coal
    Potassium (K) Wheat Straw has more potassium that coal.

  1. OMAFRA, Biomass Densification for Energy Production, 06/2011
  2. Preventing dust explosions: Advantages of fuel pucks and briquettes vs. pellets, Feb 2010
  3. The Biofuels Handbook, By James G Speight, Mustafa Balat, Ayhan Demirbas, Mrinal K Ghose, p. 401