[Terrapreta] vascular elements

[Richard Haard]

Not sure what you mean here Robert. Do you have scanning EM of coke  
that compares microstructure to carbonized angiosperm wood?

Are there studies that have shown benefits of powdered coke in soil or  
is this your own opinion?

I would also be concerned about trace elements that come along with  
the coal/lignite/coke. Such as As, Hg and Cd.

Coke could be powdered in a ball mill or mining processing equipment.  
Sequestering coal carbon after gasification would indeed eliminate  
greenhouse gasses. Is this alternative under study anywhere. ??

Rich
On Jun 2, 2008, at 10:59 PM, Robert Klein wrote:

> If the temperature is high enough, we get a porous end product with  
> all other constituents reduced or eliminated.  Biochar is done at a  
> temperature that likely yields only a fraction of the potential  
> inert high temperature form of carbon.  In other words the product  
> is a blend that is likely better accepted by the soil.
>
> At very high temperatures coal becomes coke which is also incredibly  
> porous and as tough as steel.  I think powdered coke would be very  
> good in soils, but I suspect that it is almost unmakable.
>
> That is why biochar must be produced from plant waste since it is  
> naturally prepowdered.  Wood is not.  I suspect that the best  
> results can pass  a very fine screen, wheras very little wood  
> charcoal can do so.
>
> arclein