[Gasification] reducing temp. of gasification

[GFWHELL at aol.com]

Tom,
 
Do you feel it would be possible to heat and vaporize a  sufficient 
quantity of biomass  using this "radiant exhaust  heated retort" to fulfill the 
fuel needs of the engine which is providing  the heat to the "Retort"?
Granted, biomass "above" the pyro zone could be "directly heated" by  the 
still hot exhaust if it is allowed to enter low down on the  open top fuel 
hopper. Would this arrangement, add "to much" CO 2 to the  "product" or would 
it be possible to set up a water shift  reaction zone in the base of the 
retort for producing extra  methane  from the CO 2 rich gas. I like the idea of 
excluding the nitrogen, even if it  takes a couple of KW of electricity 
from the generator to achieve such a  secondary reaction.
 
GF
 
 
 
In a message dated 9/11/2011 11:44:48 A.M. Eastern Daylight Time,  
tmiles at trmiles.com writes:

Jim Mason does this on his Power Pallet. Exhaust has been used in various  
ways to recover heat on gasification. Most often it is to dry or preheat  
fuel. 


Tom

T R Miles Technical Consultants Inc. 503-780-8185  
_tmiles at trmiles.com_ (mailto:tmiles at trmiles.com) 
Sent from mobile. 


On Sep 11, 2011, at 8:19 AM, GF <_gfwhell at aol.com_ (mailto:gfwhell at aol.com) 
> wrote:





Perhaps we should make a container which is heated by the exhaust gas  from 
the very generating set that burns the very gas we are producing.
I am sure I have seen my exhaust pipe glow, reaching 700 deg when  under 
full load.
 
GF





-----Original  Message-----
From: Anand Karve <_adkarve at gmail.com_ (mailto:adkarve at gmail.com) >
To: Discussion  of biomass pyrolysis and gasification 
<_gasification at lists.bioenergylists.org_ (mailto:gasification at lists.bioenergylists.org) >
Sent:  Sun, Sep 11, 2011 1:42 am
Subject: [Gasification] reducing temp. of  gasification


Dear All, one requires about 700C temperature for making producer gas. This 
is
 generally achieved by burning the feedstock itself, for which one
 introduces external air into the reactor. As a result, the producer
 gas gets diluted by the nitrogen in the air. If the process can be
 conducted in a closed vessel, which is heated from the outside, one
 can get combustible gas without all the nitrogen, but heating the
 feedstock inside a container cannot achieve the temperature that is
 required for producing producer gas, so that what one gets is
 primarily tar vapour. Has anyone thought of using a catalyst for
 getting pyrolysis gas at say 300 C? It would help me greatly, if such
 a catalyst were available.
 Yours
 A.D.Karve
 
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