Torrefaction

TORREFACTION:India's First Rotary Torrefaction Unit to make Bio-Coal

Torrefaction is a thermal process to convert biomass into a coal-like material.

involves the heating of biomass in the absence of oxygen to a temperature of typically 200 to 300°C

Resultant product has better fuel characteristics than the original biomass.


simplified storage of the torrefied material.


Minimal biological degradation and water uptake


makes biomass friable (80%-90% less energy consumption for grinding).

Transport and material handling is less expensive & easier

Significant loss of energy due to re-absorption of moisture in biomass (pellets) is saved


Low O/C ratio


Smoke producing compounds remove


Homogeneous output from mixed biomass


Easier Pelletisation


Torrefied pellets have more strength


Economics are in favour

TORREFIED WOOD PELLETS COMPARED TO COAL

CHARACTERSTIC COAL TORREFIED WOOD PELLETS
Heating Value 18 GJ/T >22 GJ/T
ASH 20-30% <3%
Sulphur 3-5% >0.01%
Nitrogen 1.5-3% <0.1%
Chlorine 0.05% >0.01%

TORREFIED BIOMASS/PELLETS

  • Compared to charcoal the retained volume of bio mass is more than 2 times and without the emissions associated with charcoal production and usage.
  • VOCs & hemicellulose are combusted to generate process heat required to sustain the process.
  • Warm lignin acts as a binder if TB is pelletized.
  • Depending on the process time, the TB yield varies between 85% to 95%
  • Energy density increases as ~70%-80% biomass remains with 90% of its original energy content where the original moisture is less ~90% biomass remains with 100% of its original energy content.

We provide integrated sioutions from stage of raw material selection to equipment, to process know how, turnkey implementation and operational management as well as buy-back of torrefied pellets including made from rice straw.