Carbonization is a natural process and in nature it takes 50 thousand to 50 million years to complete. The biomass initially results in peat, and then brown or hard coal is formed.  The CarboREN-process accelerates this process to complete in just a few hours. In doing so, from renewable biomass comes coal – SunCoal.

Water is introduced to the biomass In the CarboREN-process.  At around 200°C and 20 bar pressure, the majority of the water is separated from the biomass. This hydrothermal process is known as “Hydrothermal Carbonization”.

The depicted C-H-O fuel map illustrates the essential compounds in the carbon cycle.  Combustion products (CO₂ + H2O) are converted through photosynthesis using solar energy into biomass.  Oxygen is then separated. Depending on how much water is split off, peat, lignite coal, hard coal or anthracite is produced.

SunCoal is produced by the CarboREN-process through an accelerated separation of water from the biomass. Depending on the application, SunCoal of lignite or hard coal quality can be fashioned.