Stephen, I believe they liquify. Chemically a tire is styrene, butadiene, and carbon black.
Stephen A -----Original Message----- From: Stephen Maupin <[email protected]> To: Discussion of biomass pyrolysis and gasification <[email protected]> Sent: Mon, Aug 9, 2010 10:51 am Subject: Re: [Gasification] Ask a question. Question: Do the tire chips develop a char base or liquify? . I'm planning a est burn of wood/municipal bio-solids/and tire chips for gas quality analysis. ny information prior to this would be appreciated. Seeking enlightenment --- On Mon, 8/9/10, [email protected] <[email protected]> wrote: From: [email protected] <[email protected]> ubject: Re: [Gasification] Ask a question. o: "Discussion of biomass pyrolysis and gasification" <[email protected]> ate: Monday, August 9, 2010, 4:48 AM I have used tire grindings up to 50 or more % mixed with wood chips in my cross raft gasifier for heating purposes. ( not well mixed. Just dumped in a bucket f chips and a bucket of tire grindings from retread plant ) o smoke or odor down wind except of normal smell of a wood gasification boiler. can't describe it but it is unique and not unpleasant. harles --- Tom Miles <[email protected]> wrote: L Massam, Tire gasification is an interesting challenge. Many have tried it over the years but there are few industrial systems. My favorite project was called "Tyrolysis" in the Uk in the 1980s. An industrial plant was built (by Foster Wheeler, Hartlepool) to make oil as a substitute for British heating oil. The plant failed in a period of high energy prices. Another problem is that the tires gasify very quickly so it is difficult to control the reaction. We have seen several attempts to gasify individual tires that have failed partly due to the inability to control the rate of gasification. The rubber heats to the point where is gasifies in an explosive flash. A US passenger tire weighs about 20 lb. (9.07 kg), or 100 tires/ton (.907 mt). (In the US we generate the equivalent of one tire per person per year or 308 million per year.) 10 tires would weigh 200 lb (90.7 kg) containing about 5 MMBtu. That will make an impressive flare if it heats to the point where it all gasifies in a flash. Successful systems seem to use either direct combustion or pyrolysis (external heating). About 60% of the tires that are recycled in the Eastern US are burned in combustors or cement kilns. According to the Rubber Manufacturers Assn, who keeps track of Scrap Tires, the tire derived fuel market in 2009 was estimated at 2.6 million tons per year. No tire gasifiers were reported. (2009 Scrap Tire Market Report, RMA, https://www.rma.org/getfile.cfm?ID=985&type=publication) Most people gasify tire chips rather than whole tires. We gasified (50 mm) tire chips successfully in a fluidized bed gasifier, but removing the wire bead is a problem. If it is not removed it will de-fluidize the bed. Conrad Industries, in Washington has operated a tire (chip) pyrolysis plant for many years. http://www.conradind.com/ Casings could probably be coarsely shredded and pyrolyzed if you have a use for the heat. That way you can more or less meter the fuel into the reactor. Tom Miles www.gasifiers.bioenergylists.org -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of L MASSAM Sent: Sunday, August 08, 2010 12:31 PM To: [email protected] Subject: [Gasification] Ask a question. I am new to all of this and have been following the gasification community growth for a little while now. I am interested in gasifying whole car tyres, say 10 per batch. Can someone help me design this machine. I am sure I have picked up enough info to build the reactor but I need some help with the distillation process. All help and advice is sought. I have a tyre business and find that disposing these casings is expensive but furthermore the power stored within must be vast. 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