[Gasification] Syngas on Wiki_

[GF]

Tom,

What effect is produced if nitrogen were substituted by CO 2 in the Fischer Tropf process?
I know steam is cracked into O+H2, What sort of temperatures are required to convert  CO2 into methane?

HAPPY NEW YEAR

GF





-----Original Message-----
From: LINVENT at aol.com
To: gasification at bioenergylists.org
Sent: Tue, Dec 28, 2010 6:59 pm
Subject: Re: [Gasification] Syngas on Wiki_


I believe that syngas is specific to the application, and is based on the 
atio of hydrogen to carbon monoxide. As an example, ammonia syngas as 
efined in flow sheets for an ammonia plant is 3H2:1N2. Syngas for FT
eactions 
an be from .6H2:1CO-1.5H2:CO, with iron based catalysts requiring less H2 
han cobalt catalysts because the iron catalyst will do it's own shift 
eaction. Produced gas, water gas, blue gas, low heating value gas, low CV
as are 
ll more appropriate designations for air based gasification systems. Even
n 
xygen or steam driven gasification system will not produce a "syngas" 
ppropriate for certain catalyst reactions, but will work for many. 
The use of nitrogen in the gas is indeed done in some of the more 
opshisticated catalyst systems because it reduces the thermal concentration
n the 
ypically exothermic reactor such as FT reactions which in turn reduces the 
mount of cooling needed for the reactor design which can be a significant 
ffect. 
The use of the term "syngas" is inappropriate for any gasification system 
ecause it is a specific composition based on the catalyst used. Only syngas
can be called this when it is cleaned, balanced for the catalyst with 
ontaminants removed such as Cl, S, organics so that the catalyst is not
amaged 
y it. 

Sincerely,
eland T. "Tom" Taylor
resident
hermogenics Inc.
05.463.8422
ww.thermogenics.com
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