Friends, I easily run a fan assisted TLUD that is loaded with grass tablets to make wonderful grass biochar. The best tablets are made from a mix of field grasses that include golden rod and milk weed as their saps make for good binders. The tablets are about 4 cm in diameter. I break the tablets into pieces about 5 to 10 mm in height. I am now using tablets that are three or 4 years old!
I fill a reactor can that is about 15.5 cm in diameter by 19 cm tall, a 3 lbs Costco coffee can, about 3/4 full. In the beginning, quite a bit of fan power is required, but after that the fan can be turned down. Of course I can also cook over the burning gases as the grass tablets are converted to charcoal. Note: grass makes for an ashy charcoal. This is to be expected as grass has high ash content relative to wood. Note: I find that grass tablet biochar, soaked in cold water, makes a great treatment for burns. I simple form the soft wet charcoal disc over the burn. I find the pain is usually gone in less than 45 minutes, even with a blistering second degree burn. I can send pictures of my set up and the resulting grass tablet biochar if you like. Cheers, Jock On Aug 24, 2013, at 2:23 PM, Paul Anderson <[email protected]> wrote: > Stovers, > > I am forwarding a message from Paal Wendelbo this is quite informative about > pyrolysis of grass fuel in his Peko Pe. It should apply to all true TLUD > stoves with full diameter access to the fuel chamber. > > I now ask Paal: Please discuss the "grasses". There are so many types. > Do your comments / experiences relate to certain types (such as those with > nice stiff stems, which species??) more than to other types of wavy / leafy > grasses? > > Also, the diameter of you stove is important to get 1/2 kg in a bundle that > is 20 cm tall. Did you have stoves with different diameters? > > Very important info you gave about difficulties when the grasses are simply > packed in (not in bundles of vertical stems). > > Paul
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