Biochar Stoves

Using a biochar stove in conjunction with a heater such as the multi heater (which effectively incorporates a griddle, oven, water heater and room heater) whilst cutting down on your ecological footprint in other areas (such as transport) makes it possible to reduce your ecological footprint and even to reverse your carbon footprint.

Their efficiency, combined with the efficient heat capture of the multi heater, means that very little biomass is needed for fuel. The fact that they are more suited to burning twigs, brush and wood chip than they are to burning logs makes them a useful tool in the transition from fossil fuels. Without such efficiency and scale, deforestation and land grabbing may be encouraged.

A good place to start is by making or buying a tlud stove and cooking more on your porch or in your garden (or possibly using it in an open fireplace).

When you are more familiar with pyrolisis and you are ready for more biochar, more efficient heat capture, no heating bills and symbiosis with the Earth through using the biochar then you can move on to making (or getting your local welder to make) a multi heater and maybe a biochar rocket stove to go with it.

In order to understand the principles behind these stoves, it is useful to define a few terms:

Biomass is any crop or waste product of biological origin (such as wood).

Biofuel is biomass  or liquid or gas intended for burning in order obtain byproducts such as heat and biochar.

Combustion refers to the process of burning in the presence of oxygen (air).

Pyrolisis refers to the process of burning in restricted oxygen conditions, it is different to combustion as, rather than producing a flame, gases (smoke) are produced and much of the carbon (biochar) is left unburnt.

Gasification is the process of burning the biofuel (wood) gases (which have been released from the wood by pyrolisis).

A gasifier is a container designed to remove and burn the gases from matter.

A retort is a container for the pyrolisis of biomass to which heat is applied.

A kiln is a container for producing charcoal from biomass which is set alight in the kiln. The air supply is then cut off at the appropriate time, when the gases have been released but before the carbon is burnt.


2-Can Biochar Stoves

These simple stoves use natural draft rather than forced air and are continuous feed rather than batch fed stoves. I have taken inspiration from the principles of the Japanese style ‘top fed open draft’ kilns in which a fire is set and continuous flames are maintained through ‘baby … read more

Biochar Rocket Stoves

There are environmental and economic advantages to producing your own biochar as a byproduct of generating domestic heat and hot water. There are various programmes implementing clean burning cookstoves which produce biochar in various majority world countries. Variations of the tlud and the anila stove are the two … read more

TLUD Stoves

Top Light Upward Draught (tlud) Cook Stoves (See the page ‘making tlud stoves‘ for details of how to make and use these stove). Developed and implemented by Paul Anderson, amongst others, various programmes have distributed these stoves in Kenya, Haiti and other majority world countries where it is … read more

Rocket Stoves

Although they are not pyrolisis stoves and do not produce biochar, I have included this section on rocket stoves because I have used some of the design principles of rocket stoves in making the Biochar Rocket Stoves. Rocket stoves, designed by Larry Winskiari, consist of an elbow of … read more

Anila stoves

I have included this section on anila stoves because I have used some of the design principles in making the Biochar Rocket Stoves. These ingenious cook stoves, invented by Professor Ravikumar, work on the principle of having a combustion chamber inside a retort. An outer chamber (the retort) … read more