Posted by Curbie on October 22, 2009, 6:42 pm
Hi Ulysses, (long time)
From reading about the process, it seems the fuel has two functions
first to generate sacrificial heat for the charcoal (carbon), and
secondly to turn into charcoal itself to replace the charcoal consumed
in the gasification process.
I'm not trying to "hug a tree" it just seems to me that if what the
process is after is charcoal (carbon), algae may be a suitable annual
feedstock, given the time it takes to grow a tree? If you could get
waste wood (sawdust or chips) from my reading you may be in the same
boat as growing a feedstock such as algae, in that the loose or fine
fuel source needs pre-processing to form a bricket so when the bricket
turns to charcoal (carbon) it won't be so fine as to slip through the
grate or "bridge" the grate and starve or impede gasification.
It seems either sawdust/chips or algae would have to be preprocessed
and pressed into brickets.
If this has already been discussed out here I'll look up the thread on
Posted by Ulysses on October 23, 2009, 3:50 pm
Part of the appeal of biomass gasification, to me anyway, is being able to
use a variety of materials as fuel without very much processing. Once you
start expending energy to process sawdust, algae, etc I think it's time to
re-evaluate and determine if the net gain in energy is sufficient to make
the project worthwhile. I just happen to have a lot of wood chips that may
already be suitable for use without any additional processing. But, I have
not begun to build a gasifier mainly because once you start gathering up all
the parts needed and figuring out exactly how you are going to construct it
things become far more complicated than they first appeared. It seems to be
terribly important to have NO leaks due to the risk of explosion or death
from CO poisoning. Plus the amount of CO that can be produced can be very
lethal in small amounts so this must also be considered.
Posted by nospam on October 23, 2009, 4:32 pm
One could turn wood chips, straw, grass, hemp, leaves etc. into pellets
with one of these:http://www.pelletpros.com/id68.html
Posted by Curbie on October 23, 2009, 7:07 pm
On Fri, 23 Oct 2009 12:32:46 -0400, firstname.lastname@example.org wrote:
Thanks, I was going to search around to one of these, anyone have a
link to how one of these work or a DIY link?
Posted by nospam on October 24, 2009, 1:24 am
Theres a couple of video's on youtube regarding their use, but I no
longer have the link.