The Influence of Reflux Temperature on the Yield of Transportation Fuels During Plastic Waste Pyrolysis

Dobó, Zsolt and Mahner, Tamara and Kecsmár, Gergő and Nagy, Gábor (2020) The Influence of Reflux Temperature on the Yield of Transportation Fuels During Plastic Waste Pyrolysis. Materials Science and Engineering, 45 (1). pp. 77-83. ISSN 2063-6792

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Abstract

The operational parameters of the reflux play an important role during a plastic waste pyrolysis process as it recirculates the heavy hydrocarbons into the reactor for further molecule scissoring. The impact of the reflux temperature on the pyrolysis oil composition was investigated and the results are summarized in this paper. A plastic waste blend contai-ning HDPE, LDPE, PP and PS was pyrolyzed in a laboratory scale batch reactor in the reflux temperature range of 150–300 °C, while the obtained pyrolysis oil was further processed by atmospheric distillation. Results show that by decreasing the reflux temperature the yield of gasoline range hydrocarbons can be significantly enhanced: 285 g/kgsolid waste gasoline yield was measured at 300 °C reflux temperature, while 150 °C resulted 446 g/kgsolid waste. Additi-onally, the pyrolysis gas yield containing mostly C1-C4 hydrocarbons is also enhanced by lowering the reflux temperature. Results show, that producing gasoline and diesel range hydrocarbons from plastic wastes through pyrolysis is a viable method to reduce the accumu-lation of plastic wastes and could provide value added transportation fuels.

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