[Gasification] CO2 recycling

[gfwhell at aol.com]

 Dan,
Raising the temperature in an endothermic reaction with the use of micro wave energy is a comparatively new process.
If this reaction subtracts from the overall performance of the "gasification process" big deal.
The creation of clean tar free gas for use in powering an IC engine which provides the power for this process will be nominal.
Especially if exhaust gas from the engine is utilized for this process.
GF


 


 

-----Original Message-----
From: Daniel Chisholm <dmc at danielchisholm.com>
To: Discussion of biomass pyrolysis and gasification <gasification at listserv.repp.org>
Sent: Wed, 3 Oct 2007 6:45 am
Subject: Re: [Gasification] CO2 recycling










On Tue, 2007-02-10 at 22:27 -0400, gfwhell at aol.com wrote:
> ... CO2 as "recyclable" ... seems to have been missed by most.
> The addition of steam in the proximity of hot carbon is about all that
> is needed to produce CO.+H2
> Maintaining the  temperature is crucial for this reaction which is,in
> itself,  endothermic. I have been researching the possibility of
> providing the additional heat necessary to maintain this reaction
> which will allow the hot exhaust gas from an engine to be returned for
> recycling. I believe it will be possible to eliminate much of the
> nitrogen entirely from the reaction zone.. For some years now,  gases
> have been refined and processed with the use of microwave plasma. the
> temperature of which can reach 10000K,.

Just be sure that your process makes sense when operating under the
following rules:

2 - heat flows from high temperature to lower temperature (so the heat
in a 400-600C engine exhaust gas stream won't flow into an 800-900C
reaction zone - but it can be used to preheat incoming reactants)

3 - non-thermal energy is more valuable than thermal energy, typically
by a factor of 3X-7X.  (So any electricity, shaft power, etc that your
process uses must produce more than 3X-7X as much heat in the end, in
order for your process to be profitable).





-- 
- Daniel
Fredericton, NB  Canada


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