Re: GAS-L: Emissions of sulfur dioxide from biomass gasification plants

[Carefreeland@aol.com]

In a message dated 2/11/02 12:02:14 AM Eastern Standard Time, enecon@ozemail.com.au writes:

    > reply below text
> Does anyone have any information on how much sulfur dioxide forms when a
> woody biomass fuel is gasified?
>
> I have various woody fuels with 0.02%  - 0.08% w/w dry basis sulfur (as
> sulfides) that I wish to gasify.  Does all the sulfur convert to sulfur
> dioxide or other gaseous sulphur compounds, or does some convert to sulfates
> and stay in the ash.?  Does gasification produce less sulfur dioxide than
> combustion?  What influences how much sulfur dioxide is formed?
>
> Regards,
>
> Jim
>  
> > Jim, 
>     I cannot answer this completely.  I can say that for years, lime and silicon based carbonate Iron ores have been *burned* to remove sulfur and phosporus.  The temperature is probably the most critical factor.  

    At lower temperatures, the sulfur would continue to bond to any calcium as first 
> choice, but also other minerals in the ash.   At high enough temperatures those bonds would surely break.  The gas can be cleaned up though by running it through lime just as a scrubber or filter for high sulfur coal emissions. 

       All you can do is test. 

>     Maybe this helps,    
>                 Daniel Dimiduk