Torrefaction is a thermo-chemical treatment of biomass in the 200 to 340 degrees Celsius range. In this process the biomass partly (especially the hemi-cellulose) decomposes, giving off various types of volatiles. The remaining torrefied biomass (solid) has approximately 30% more energy content per unit of mass. Annually, photosynthesis is said to store 5-8 times more […]