Fractions of waste polypropylene and polyethylene were pyrolyzed in a pyrolysis plant under different
conditions. In this study, the influence of the reaction temperature (650–750 °C), the feed rate, and the kind
of fluidizing medium on the product spectrum were investigated. Pyrolysis of the PP fraction produced oils
up to 43 wt.% of the product. With respect to the PE fraction, the maximum oil yield was above 60 wt.% of
the product. The target compound was BTX aromatics, whose amount in the oils reached 53 wt.% for the PP
fraction and 32 wt.% for the PE fraction. It was shown that the PE fraction yielded a higher liquid product
compared to the PP fraction, and that the concentration of aromatics in the oil increased at higher reaction
temperatures for both the PP and PE fractions. A higher feed rate and the use of a gas product as the
fluidizing medium were favored for the production of oils for both the PP and PE fractions. The oils that were
obtained in the experiments almost had no metal and chlorine contents. The maximum heating value of the
gas obtained in the experiments was about 50 MJ/kg.