Crispin,
Are you saying that if insulated, and hot enough, that the pyrolysis
reactions will give sufficient H2 and O2 to combust (become simple
water) even into the center of very thick logs?
I will allow for some (but not massive fire) extra external heat to be
added as needed, because the NET heat of pyrolysis and this combustion
is endothermic (slightly). I also allow some extra heat because the
biomass will not be totally dry so some heat is needed to bring up the
temperature of that inert H20.
Other issues: What about all those other tars and oils and vapors that
are combustible but for which there is not sufficient Oxygen inside the
biomass molecules? Are you expecting this to drain? Or to remain
inside the "char" that would be loaded with such "gunk"? That would
be interesting char for burning, but not as biochar for soils and plants.
Paul
Paul S. Anderson, PhD aka "Dr TLUD"
Email: [email protected] Skype: paultlud Phone: +1-309-452-7072
Website: www.drtlud.com
On 8/12/2013 10:38 PM, [email protected] wrote:
Dear Dick
Biomass contains enough Oxygen to seed its own destruction. All you
have to do is heat the log and keep it insulated well without O2
getting in.
It will burn almost all the Hydrogen and char the entire thickness.
Regards
Crispin
Detective Erin,
Within the fine print in your fine report, I found, "To confirm this
claim, the author, during his field research for his master's thesis,
went up to the forests of Barangay Bulala in Sta. Elena to observe the
traditional practices of wood charcoal production. There he found
several piles of huge dirigkalin logs ready for the carbonization."
Could you find how they carbonize HUGE logs? What is huge and do
they down size them before carbonization? Since most of us, including
trees, will eventually fall and many are of no value for lumber or
firewood, it would be helpful to know if someone is charring hug logs.
The largest I have received at my farm/compost site, is a cotton wood
trunk, 7' dia. X 15', which I would gladly donate to whatever.
Thanks, Dick
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