Ekici, EcrinYildiz, GurayYildiz, Magdalena JokaKalinowska, MonikaSeker, ErolWang, Jiawei2024-06-192024-06-1920242095-01792095-0187https://doi.org/10.1007/s11705-024-2429-xhttps://hdl.handle.net/11147/14535Under optimal process conditions, pyrolysis of polyolefins can yield ca. 90 wt % of liquid product, i.e., combination of light oil fraction and heavier wax. In this work, the experimental findings reported in a selected group of publications concerning the non-catalytic pyrolysis of polyolefins were collected, reviewed, and compared with the ones obtained in a continuously operated bench-scale pyrolysis reactor. Optimized process parameters were used for the pyrolysis of waste and virgin counterparts of high-density polyethylene, low-density polyethylene, polypropylene and a defined mixture of those (i.e., 25:25:50 wt %, respectively). To mitigate temperature drops and enhance heat transfer, an increased feed intake is employed to create a hot melt plastic pool. With 1.5 g<middle dot>min-1 feed intake, 1.1 L<middle dot>min-1 nitrogen flow rate, and a moderate pyrolysis temperature of 450 degrees C, the formation of light hydrocarbons was favored, while wax formation was limited for polypropylene-rich mixtures. Pyrolysis of virgin plastics yielded more liquid (maximum 73.3 wt %) than that of waste plastics (maximum 66 wt %). Blending polyethylenes with polypropylene favored the production of liquids and increased the formation of gasoline-range hydrocarbons. Gas products were mainly composed of C3 hydrocarbons, and no hydrogen production was detected due to moderate pyrolysis temperature.eninfo:eu-repo/semantics/closedAccesswaste plasticspolyolefinschemical recyclingpyrolysisalternative fuelswaste-to-energyArticle2-s2.0-8519542529110.1007/s11705-024-2429-x