Dong Fang Hui Le Inc (DFHL)

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Torrefaction Technology:

Torrefaction is a scientifically proven method for improving the properties of biomass as a fuel. Torrefaction is the thermo-chemical treatment of biomass at 200 to 300°C, carried out under atmospheric conditions and in the absence of oxygen. During the process the biomass partly decomposes, giving off various types of volatiles. The final product is the remaining solid, which is often referred to as torrefied biomass, or torrefied wood when produced from woody biomass.

Typically, 70% of the mass is retained as a solid product, containing approximately 90% of the initial energy content. The remaining 30% of the mass is converted into torrefaction gases, but contains only approximately 10% of the energy content of the biomass. Hence a considerable energy densification can be achieved, typically by a factor of 1.3 on mass basis. This example points out one of the fundamental advantages of the process, which is the high transition of the chemical energy from the feedstock to the torrefied product, while concurrently the fuel properties are improved

Torrefaction can potentially be applied to a wide variety of biomass (softwood, hardwood, herbaceous, wastes) so that the range of biomass feedstock for torrefied wood briquettes can be greatly increased. ecoTECH plans to apply torrefaction technology to increase the energy output in biomass products and to provide a coal-like product with significant environmental advantages.