[Gasification] Charcoal Reduction Mill

Tom Miles tmiles at trmiles.com
Tue Aug 30 10:28:04 CDT 2011


Toby,

 

If you have done a complete job of gasification there are no binders left.
The cellulose and hemicelluloses are converted to gas and the lignin has
been converted to carbon char.  What remains is char from the lignin that
has not been reduced to gas (CO+H2) by CO2. there are no binding agents.
That's why briquette makers add starch. 

 

This is in unrecognized problem even in torrefaction. Pyrolysis at 285 C
only reduces the mass by 10% (dry basis) but it transforms the biomass
enough so that you no longer have hydrogen bonding or (lignin) plastic flow.
Cook it too long and your pellets don't hold together very long. If we
actually see torrified wood pellets being produced commercially it will
probably be cooked "rare" rather than "medium" or "Well done". 

 

Tom

 

From: gasification-bounces at lists.bioenergylists.org
[mailto:gasification-bounces at lists.bioenergylists.org] On Behalf Of Toby
Seiler
Sent: Tuesday, August 30, 2011 5:13 AM
To: gasification at lists.bioenergylists.org
Subject: Re: [Gasification] Charcoal Reduction Mill

 


Jeff, Mark, 

 

Here is another concept... but without a mill.  

 

Make the downdraft bottom section so as material flows in, it goes into a
hydraulic driven compactor (ram or rotary) that forces it down an extrusion
tube, where it cools and uses the heat to help bond the remaining lignin.
Use the latent heat, just add pressure (of course in an oxygen free set-up).


 

Toby

Seilertechco

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/gasification_lists.bioenergylists.org/attachments/20110830/b8bfd701/attachment.html>


More information about the Gasification mailing list