By improving the rate of liquid yield: " As pre-treatments concentrate on the suitable fraction for pyrolysis and reduce the undesirable materials (metals, PVC, PET, inorganics, cellulosic materials), they improve the yield to liquid products and considerably reduce the halogen content." Also see : Fulgencio-Medrano, L.; García-Fernández, S.; Asueta, A.; Lopez-Urionabarrenechea, A.; Perez-Martinez, B.B.; Arandes, J.M. Oil Production by Pyrolysis of Real Plastic Waste. Polymers 2022, 14, 553. https://doi.org/10.3390/polym14030553
The best way to filter and make diesel from plastic pyrolysis clean and usable for engines is to use a vacuum distillation process. This process involves heating the plastic pyrolysis to a high temperature in a vacuum chamber. This process removes any impurities and creates a fuel that is clean and of a high quality. The fuel can then be used in engines without any problems.