Roasting

Biomass Torrefaction: High-Performance Process

The LMK torrefaction process is an industrial technology developed to upgrade, optimize, and standardize solid biomass fuel.

Prototype installed at the LMK Energy facility in Mazingarbe, France.

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  Technology: Direct-heated moving-bed reactor. Heat treatment occurs continuously inside a vertical column with counter-current flows of biomass and hot gases.

  
  

• Thermal Profile: Biomass moves through an inert gas stream reaching temperatures up to 240°C (for wood).

  
  

• Material Transformation: Following drying, temperature increases drive off light volatile organic compounds and degrade hemicellulose polymers, breaking down the fibrous matrix for enhanced grindability.

  
  

• Discharge: Torrefied product is discharged at the base of the column and cooled.

  
  

Properties of “Green Coal” (Bio-Coal)

Refined solid fuel produced from lignocellulosic biomass (forestry or agricultural residues) serving as a drop-in replacement for fossil coal in power and heat generation.

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  Higher Heating Value (HHV): 20.5 – 24 GJ/t

  
  
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  Moisture Content: Less than 5%

  
  
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  Operational Advantages: Higher energy density, superior grindability, and easier handling, storage, and transport compared to raw biomass.