Biomass torrefaction is a process in which biomass is heated under inert or low-oxygen conditions to enhance its thermal properties. It is commonly used to produce high energy-density solid fuels or as a pretreatment step for biochar production. The core principle involves heating the biomass to remove moisture and volatile components (such as hemicellulose), while optimizing the yield and energy density of the solid product.


Temperature Range:
Biomass torrefaction is typically carried out at temperatures between 200–300 °C.


Process Purpose:
Torrefaction is generally described as a pretreatment process aimed at improving the fuel characteristics of biomass, such as increasing energy density, reducing moisture content, enhancing grindability, and preparing the material for subsequent processes like gasification.


Differences in Product Characteristics:
Torrefaction products primarily focus on enhancing biomass performance as a fuel, aiming to achieve higher solid yields and produce a more uniform solid product with greater energy density.