Studies on the dechlorination and oil-production technology of waste plastics |
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Authors: | Kiyoshi Saito Hideo Narita |
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Institution: | (1) Resources and Energy Division, Hokkaido National Industrial Research Institute, 2-17-2-1 Tsukisamu-higashi, Toyohira-ku, Sapporo 062-8517, Japan Fax +81-11-857-8944 e-mail: h.narita@aist.go.jp, JP |
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Abstract: | Recycle technology for waste plastics containing polyvinyl chloride (PVC) has been developed in the Hokkaido National Industrial
Research Institute for the production of solid and liquid fuel, and has established a recycling process which includes a dechlorination
process for PVC plastics, and a two-stage catalytic pyrolysis process for plastics using zeolite catalysts. The dechlorination
equipment consists of a two-axis screw extruder with a heating element, which can remove chlorine up to 99.9 wt. % from PVC
containing plastics as hydrogen chloride. The product had about 44 000 kJ/kg calorific value and was fed into the next oil
production process, although it could also be used as a solid fuel. Natural and synthetic zeolite were used as catalysts for
the two-stage catalytic process, which produced a light oil with a boiling point which was between those of kerosene and gasoline.
The yield of this oil reached 82 wt. %. The chemical type was analyzed using liquid chromatography, and was found to have
many aromatic compounds. These technologies make it possible to produce a nonpolluting, high-calorie solid fuel and a liquid
fuel very efficiently.
Received: July 19, 2000 / Accepted: September 21, 2000 |
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Keywords: | Dechlorination Oil production Waste plastics Zeolite Recycle technology |
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