Reprocessing of used tires into activated carbon and other products

Landfilling used tires which are generated each year in the United States is increasingly becoming an unacceptable solution. A better approach, from an environmental and economic standpoint, is to thermally reprocess the tires into valuable products such as activated carbon, other solid carbon forms...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 1995-09, Vol.34 (9), p.3102-3111
Main Authors: Teng, Hsisheng, Serio, Michael A, Wojtowicz, Marek A, Bassilakis, Rosemary, Solomon, Peter R
Format: Article
Language:English
Subjects:
Activated carbon
Applied sciences
Carbon dioxide
Chemical analysis
Exact sciences and technology
Other wastes and particular components of wastes
Pollution
Polymer industry, paints, wood
Pyrolysis
Q1
Technology of polymers
Tires
Waste treatment
Wastes
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Summary:Landfilling used tires which are generated each year in the United States is increasingly becoming an unacceptable solution. A better approach, from an environmental and economic standpoint, is to thermally reprocess the tires into valuable products such as activated carbon, other solid carbon forms (carbon black, graphite, and carbon fibers), and liquid fuels. In this study, high surface area activated carbons (> 800 m super(2)/g solid product) were produced in relatively high yields by pyrolysis of tires at up to 900 degree C, followed by activation in CO sub(2) at the same temperature. The surface areas of these materials are comparable with those of commercial activated carbons. The efficiency of the activation process (gain in specific surface area/loss in mass) was greatest (up to 138 m super(2)/g original tire) when large pieces of tire material were used (approx.170 mg). Oxygen pretreatment of tires was found to enhance both the yield and the surface area of the carbon product. High-pressure treatment of tires at low temperatures (
ISSN:0888-5885
1520-5045
DOI:10.1021/ie00048a023