Polystyrene comprises 14.7% of municipal solid waste in Saudi Arabia.
The optimum temperature for pyrolysis was 450 °C at 75 min retention time.
At optimum conditions liquid fuel was 76% by mass of polystyrene.
The liquid fuel had a high energy value of 41.2 GJ/t and density (0.92 g/cm3).
The liquid fuel had low pour point (−18 °C) and freezing point (−64 °C).