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Journal of Material Cycles and Waste Management

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01-04-2014 | ORIGINAL ARTICLE

Recovery of benzene-rich oil from the degradation of metal- and metal oxide-containing poly(ethylene terephthalate) composites

Authors: Shogo Kumagai, Guido Grause, Tomohito Kameda, Toshiaki Yoshioka

Published in: Journal of Material Cycles and Waste Management | Issue 2/2014

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Abstract

Pure poly(ethylene terephthalate) (PET) resin and metal-/metal oxide-containing PET composites were thermally decomposed in the presence of Ca(OH)₂ using a tube reactor. The effects of batch and continuous processing, the presence of Ca(OH)₂, and PET size on benzene production were investigated. A maximum benzene yield and purity of 82.9 % and 78.8 wt%, respectively, were obtained at 700 °C in the presence of Ca(OH)₂ when using small PET particles; further, a continuous feed reactor was favored over a batch reactor. Effective contact between PET and Ca(OH)₂ was important in the PET degradation, which promoted hydrolysis of PET and decarboxylation of terephthalic acid, whereas pyrolysis was suppressed. Furthermore, the results of thermal decomposition of PET-based waste—PET-based X-ray films, magnetic tape, and prepaid cards—indicated that the metal and metal oxides contained in the waste had no significant catalytic effect on PET degradation or on the recovery of benzene-rich oil in the presence of Ca(OH)₂.

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Title: Recovery of benzene-rich oil from the degradation of metal- and metal oxide-containing poly(ethylene terephthalate) composites
Authors: Shogo Kumagai
Guido Grause
Tomohito Kameda
Toshiaki Yoshioka
Publication date: 01-04-2014
Publisher: Springer Japan
Published in: Journal of Material Cycles and Waste Management / Issue 2/2014
Print ISSN: 1438-4957
Electronic ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-013-0194-x

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