[Gasification] To all... a question

[Greg Manning]

Greetings Kenny.

In answer to your question, yes, ans no.

 Here, I'll explain, at 30 % moisture, (and add the humidity of inlet air)
you are pushing the level of self-sustainability over the maximum.

if you had a feedstock of lesser water content, then yes to the
self-sustaining.

Trying to add some of the evolved gas back into the system, is simply not a
good idea, nor is it prctical, or safe.

the amount of torrefied char would be dependent on the flow rate of
feedstock, however, anything faster than total char, generally ends
up shutting down (due to the influx of tars from incomplete combustion of
the oils, before the gasification portion of the unit).

With the addition of a parasitic heat source, one could do what you are
asking, but the amount of char (loaded with ash) as an output would be
quite low, unless you would consider only surface charring, (with raw wood
internally.

Greg Manning,
Canadian Gasifier ltd.




On Thu, Jul 19, 2012 at 10:54 AM, Kenny Redd <kenredd at gmail.com> wrote:

> As a novice to gasification, I have been absorbing the enlightening info
> on this forum.  Here's my question: Is it possible to design a single
> reactor vessel to intake woody biomass (@30% moisture) and output syngas,
> torrefied woody biomass and biochar in a continuous process and
> maintain self-sustaining combustion without returning a portion of the
> syngas to aid combustion?  My gut feeling (and my novice number crunching)
> says it can be done.  Am I overly optimistic?  Are there any such systems
> in use today?
>
> Thanks in advance for any additional enlightenment.
>
> Kenny Redd
> Inova Energy LLC
>
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