Re: GAS-L: Dechlorinated Char

[Arnt Karlsen <arnt@c2i.net>]

On Fri, 20 Sep 2002 17:52:11 +1200, 
"Graeme Williams" <graeme@powerlink.co.nz> wrote in message 
<000b01c26069$e2882140$09ff58db@newpc>:

> Hello Mr Fujiura
> 
> I cannot answer your question of how to de-chlorinate your char for
> other purposes, as chlorine isn't normally found in char residue from
> biomass gasification.  In fact it can be a low grade activated carbon.
> 
> Because your type of pyrolysis or gasification fuel is not stated, I
> can only guess that it is a waste stream that includes P.V.Cs etc.
> (MSW?)
> 
> In this situation chlorine could become fixed in the char when the
> disassociation temperatures are insufficient to separate them from the
> benzine ring and the whole lot  carbonises fixing the chlorine into
> the char.
>  
> The only safe way to dispose of these chars if you must use them, is
> in a high performance throated gasifier where the chlorine will
> separate in the high temperature reducing atmosphere.

..sound reasonable, but this does not cut it in my jurisdiction, 
where I am supposed to pay for proving this correct academically,
_before_ I am funded or try do it myself in RL.  Cotton Wall[Tm].  ;-)

..has anyone published anything on de-chlorinization of MSW or PVC? 

> Don't even consider burning this char to co-fire combustion processes
> as you will then have to deal with a dioxin emission.

..here we need to educate the legislators and the public on 
the why's and how's on using gasifiers to de-chlorinate MSW.

..I saw an article in a scandinavian popular science magazine called 
"Illustrert Vitenskap" several years back on, as I understand it, 
destructive gasification of freon gases in an ironIII-chlorinated 
char bed, AFAIR this, it was some danish research.  

-- 
..med vennlig hilsen = with Kind Regards from Arnt... ;-)
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.



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>