Verfahren zur Herstellung von Energieträgern aus organischen Stoffen

The present invention relates to a method for the conversion of biomass into solid matter having higher energy density, particularly into coal, humus or peat. Using said method, organic matter is reduced in water from the biomass by forming a suspension and part of the suspension to be converted is heated to a reaction temperature and is converted under elevated pressure by hydrothermal carbonization into the solid matter having higher energy density. The method is characterized in that the conversion takes place in a reaction volume that is below the surface of the earth. The method ensures consistency of product quality and greater economic efficiency of the process.