Sep 232014

torrefaction- Torrefaction is a thermochemical treatment of biomass at 200 to 320 °C. It is carried out under atmospheric pressure and in the absence of oxygen, i.e. with no air. During the torrefaction process, the water contained in the biomass as well as superfluous volatiles are released, and the biopolymers (cellulose, hemicellulose and lignin) partly decompose, giving off various types of volatiles. The final product is the remaining solid, dry, blackened material[3] which is referred to as “torrefied biomass” or “bio-coal”.

Told in the Desert by Clark Ashton Smith

 Posted by at 6:00 am