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[GreenYes] Tires and combustion
Hi Don ~

It is my understanding that the level of sulfur in tires is quite low, maybe
even lower than in coal. Do you have any hard data? Also, do you know what
are the levels of zinc, dioxins, furans and chlorinated compounds in tires
or their combustion?

>From a nearly 200 page study that I did in 1977, I wrote back then:

	"A major question of incinerating tires is the air pollution
associated with the process. Two pollutants that have attracted the most
attention are sulfur and zinc. Zinc oxide seems especially worrisome, since
zinc oxide fumes are highly disabling to people, although there is complete
recovery within 24 hours. In tests at the General Motors firing of tires
with coal, particulate air pollution increase by 62.4%, of which 15.0% was
zinc oxide. Using a computer model, maximum zinc oxide concentrations of 42
mg/m3 were predicted at a distance of 1200 meters from he plant, which is
below EPA standards. Total zinc oxide emissions from the boiler increased
from 0.09 lbs/hour to 10.2 lbs/hr. Sulfur dioxide concentrations in the
emissions were reported to have been decreased by the use of tires, but the
sulfur content of the coal was not given."

I would think that the chemistry of tires has changed over the last 25+
years (as well as the air pollution standards, and additional test data) and
would appreciate some hard data.

John Reindl, Recycling Manager
Dane County, WI 

> -----Original Message-----
> From: Don Hughes [mailto:djhughes@mailbox.syr.edu]
> Sent: Tuesday, December 10, 2002 12:00 PM
> To: jholt; muna@iafrica.com; Peter Anderson
> Cc: greenyes@grrn.org
> Subject: RE: [GreenYes] Tire Recycling
> 
> 
> There is mistaken impression that "burning hotter" = 
> "Cleaner."  This is 
> not the case.  While a hot combustion temperature can be good 
> for promoting 
> complete combustion of the waste material, that does not 
> necessarily equate 
> with better emissions.  Tires contain large amounts of sulfur 
> (about 2%, if 
> my memory serves) and zinc.  Sulfur, when burned, produces 
> SO2 which turns 
> into acid rain in the atmosphere.  Zinc is a heavy metal 
> which is essential 
> for living organisms at low concentrations, but toxic at high 
> concentrations.  There is also the issue of formation of 
> chlornated dioxins 
> and furans, all of which are very toxic.
> For these reasons, I would not recommend burning tires unless 
> (a) there is 
> no other possible disposal/recycling option, and (b) you 
> employ extremely 
> effective air pollution controls.
> Don Hughes
> 
> fAt 09:19 AM 12/10/2002 -0600, jholt wrote:
> > >From what the research I've done, I've found that the 
> tires burn hotter than
> >conventional heating methods, and therefore cleaner.  The 
> emissions here are
> >actually cleaner than they would be if they were just using coal.
> >
> >-----Original Message-----
> >From: owner-greenyes@grrn.org 
> [mailto:owner-greenyes@grrn.org]On Behalf
> >Of muna@iafrica.com
> >Sent: Tuesday, December 10, 2002 6:50 AM
> >To: Peter Anderson
> >Cc: greenyes@grrn.org
> >Subject: Re: [GreenYes] Tire Recycling
> >
> >
> >Hi all!
> >
> >I would appreciate information on suppliers of technology 
> that allows one to
> >re-use
> >tires (we spell them tyres here!), as we think that they may 
> be useful for
> >buidling
> >roads and playgrounds....
> >
> >also:
> >
> >On 6 Dec 2002 at 11:41, Peter Anderson wrote:
> >  Companies that reuse old
> > > tires include utilities, which burn them to make electricity, and
> > > cement manufacturers, which bake them in kilns with other 
> ingredients
> > > to produce Portland cement.
> >
> >this is frightening- the emissions that this produces are 
> extremely toxic,
> >so please, all,
> >do not support this method of disposal - the impacts are 
> bio-accumulative,
> >and
> >extremely harmful....
> >
> >regards
> >
> >Muna
> >******************************************
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> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Don Hughes, PhD student                         *
> Dept of Chemistry, Jahn Laboratory                      *
> SUNY-College of Environmental Science & Forestry        *
> 315-470-6597    djhughes@syr.edu                        *
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> "The truth is always the strongest argument."
> Sophocles (495-406 BC); Greek dramatist.
> 
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