WHAT IS CHAB?
Combined heat and biochar (CHAB) technologies are systems that optimize the combustion of wood residues. The process of combusting
biomass for biochar produces not only a high carbon solid product but also thermal energy that can be used for heating and cooling.
CHAB technologies fall into one of three main categories: furnace systems, gasifiers, and retort systems. A furnace style combined heat
and biochar system uses an insulated burn chamber with a heat exchanger or boiler. A wood stove is an example of a furnace system without
a heat exchanger. Gasifiers divide fuel into zones where the processes of drying, pyrolysis, and gasification take place, allowing
biochar to be collected and heat to be utilized. Retort systems are unlike gasifiers and furnace systems in that the biomass is
physically separated from the heat source. Heat is transferred through the walls of the retort and the biomass inside where moisture and
gasses are released. The gasses released can directly combusted for heat energy.
All three types of technology can be configured in a number of ways depending on the manufacturer and the project specifications
Read more about Combined Heat and Biochar