[Digestion] (no subject)

Igor Škrjanec igor.skrjanec at gmail.com
Tue Oct 5 04:55:26 PDT 2010

  Na 4.10.2010 20:15, Arturo Ávalos je pisal:
> Hello all
> Does someone know something about use ferric chloride to reduce the 
> sulfur content in the biogas?
> Thanks for the information
> / /
> Arturo
> _______________________________________________
> Digestion mailing list
> Digestion at lists.bioenergylists.org
> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org

Hallo Arturo

Ferric chloride is normally use for a neutralizations of H_2 S. Hydrogen 
sulfide is slightly soluble in water and acts as a weak acid 
<http://en.wikipedia.org/wiki/Weak_acid>, because of this is harmful for 
a CHP unit.

H_2 S is a product of sulfate-reducing bacteria 
<http://en.wikipedia.org/wiki/Sulfate-reducing_bacteria> which are also 
present in biogas reactor. Sulfate-reducing bacteria 
<http://en.wikipedia.org/wiki/Sulfate-reducing_bacteria> use present 
sulfats from substrates to oxidize the organic matter.

Hydrogen sulfide reacts with metal ions to form metal sulfides 
<http://en.wikipedia.org/wiki/Sulfide> (H_2 S + FeCl_2 ? FeS + 2 HCl). 
Iron sulfide is not soluble and it is not problematic for a biogas 
process and CHP unit.

When biogas plant works normally hydrogen sulfide is not problematic, 
because of its oxidation with aerobic bacteria to elementary sulphur.



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/digestion_lists.bioenergylists.org/attachments/20101005/e0a0827e/attachment-0001.html>

More information about the Digestion mailing list