 Torrefaction removes (by gasification) the parts of the biomass that has the lowest energy content, while the parts with the highest energy content remain.That is, approximately 30% of the biomass is converted to gas during the torrefaction process (and potentially used to power the process), while 70% remains, usually in the form of compacted pellets or briquettes.This solid product contains approximately 85% of the original biomass energy however.