[Gasification] Steam injected into flame (andy schofield

[Thomas Reed]

Dear All:

John Black is absolutely correct about the role of steam in moderating 
temperature and slag formation.  (CO2 also works.)

Thanks, John.

TOM REED         BEF. 

JBlack9999 at aol.com wrote:
> Re - the addition of steam to gasifiers
>  
> In larger gasifiers, where heat loss is not a significant factor in the  
> energy balance, steam can be used to control reaction  temperature.  
>  
> By controlling the steam to air ratio, the heat released by the  exothermic 
> (heat producing) oxidation reaction of carbon to carbon monoxide  could be 
> balanced by the endothermic (requiring heat) reaction of carbon  with steam.    
> This produces a better carbon burn-out in charcoal  or coal gasifiers while it 
> avoids problems associated with ash  sintering or melting.   It is usually not 
> necessary in biomass  gasifiers, since biomass drying and pyrolysis both 
> require heat.    Also the amount of charcoal produced after pyrolysis is much 
> smaller than in  coal gasifiers.
>  
> John
>  
>  
>  
> First Dr. Anderson wrote posing the interesting question about Mr Hao's  
> gasifiers:
>
> Does the "water gas reaction" (is that the correct  name?) going to come 
> into
> play?  What are the gains of injecting the  steam?
>
> Finally Dr Reed Wrote in reply to [Stoves] FW: Steam into a 800 ?C  hot fire 
> burns
> stronger;is common known by firemen .  (Thomas Reed):
>
>
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