Jim: 

Thanks for this report. 

The basic idea of an upended can has appeared a few times on various lists, but 
I recall no one reporting the regular use as much as you below. 

The beauty of this approach to making char - is that every bit of the valuable 
pyrolysis gases are being used productively - to heat your home. 

I am pleased to hear that the ammo cans are holding up. They seem like a good 
size. Can you describe their cost and where you have found them? 

Ron 


----- Original Message ----- 
From: "karnask" <[email protected]> 
To: [email protected] 
Sent: Saturday, December 18, 2010 8:48:43 AM 
Subject: [biochar] Woodstove Biochar Fuel Cell 






I have been reading the site for a couple years now and have learned quite a 
bit, but I have not yet heard of anybody making biochar in their woodstoves. 

I fill an ammo can, 6"x12"x6", with dry wood and fill in the cracks with wood 
pellets. The can is placed upsidedown in a hot bed of coals and I burn it hot 
until it is degassed and the temperature has cooled. With thick leather gloves, 
the can is removed from the fire and placed on the brick hearth to cool. If it 
smokes at this stage it has not been degassed and still has lignocellulosic 
material to carbonize. 

I burn 1-3 of these cans in my woodstove daily producing a uniform two pounds 
of biochar which I post treat in my compost pile. The steel in an ammo can is 
of high quality because it is going strong after more than 40 burns. I cycle 3 
cans. 

I have made hundreds of pounds of biochar with outside methods and have spent a 
couple thousand dollars on materials and fabrication, but with this method 
(stealing others' promotion): 

iCan HEAT MY HOME WITH FUEL FROM HEAVEN 
iCan IMPROVE MY SOIL 
iCan FEED MY FAMILY WITH THE BEST VEGETABLES 
iCan IMPROVE THE ATMOSPHERE AND BE CARBON NEGATIVE 
iCan MAKE A DIFFERENCE. 

This is a simple and functional way to produce biochar for the home. 
Try it, you'll be amazed. Remember, two pounds is two pounds times a thousand 
years. It adds up quickly. 

Jim Karnofski 
Ilwaco, WA 
[email protected] 


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