Gasification of waste plastics by steam reforming in a fluidized bed |
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Authors: | Toshiro Tsuji Akito Hatayama |
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Institution: | (1) Division of Chemical Process Engineering, Graduate School of Engineering, Hokkaido University, Kita-ku N13W8, Sapporo, Hokkaido 060-8628, Japan |
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Abstract: | The process of producing synthetic gas from waste plastics by steam reforming was investigated. To evaluate this process,
the steam reforming of the oils derived from low-density polyethylene and polystyrene were carried out using a laboratory-scale
fluidized bed of Ni-Al2O3 catalysts. The performance of gasification in terms of carbon conversion, gas yield, and gas compositions was examined. Although
oils derived from plastics contain many kinds of heavy hydrocarbons and aromatics, they were well gasified at temperatures
above 1023 K with a steam/carbon ratio of 3.5 and a weight hourly space velocity of 1 h−1. The hydrogen content of the product gas was very high at approximately 72 vol% for polyethylene-derived oil and 68 vol%
for polystyrene-derived oil. These compositions agreed well with the values calculated from chemical equilibrium. |
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Keywords: | Steam reforming Waste plastics Hydrogen Coking Catalyst |
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