**2.4 Waste plastic pyrolysis oil (WPPO) physical properties**

**Table 1** shows physical properties of the waste plastic pyrolysis oil obtained through the pyrolysis process using waste plastics from municipal solid waste (MSW) management sites. Compared with the properties of conventional diesel fuel oil, these properties are in optimized conditions. The oil is yellowish in color as shown by the picture shot in **Figure 5**. The liquid distillate, which is free of visible particulate sediments, has a flash point of 20°C and a gross calorific value (GCV) of 40.15 KJ/kg. This calorific value of the waste pyrolytic oil compares with the range of petroleum fuels including conventional diesel; thus, making it capable of giving the same comparative working performance results in diesel internal combustion engines.

The distillation report analysis shows that the waste plastic pyrolysis oil (WPPO) has an initial boiling point (IBP) of 119°C–353.5°C. This indicates a presence of other fuel oil components such as kerosene, gasoline and, to some extent, diesel oil in the tested samples. Therefore, it is possible for this oil to be a biofuel feedstock in future, *The Influence of Exhaust Gas Recirculation on Performance and Emission Characteristics… DOI: http://dx.doi.org/10.5772/intechopen.105011*

#### **Figure 4.**

*Waste plastic pyrolysis processing plant flow chart. Flow chart nomenclature 1. Pyrolysis reactor, 2. Carbon black discharge, 3. Carbon black deep processing, 4. Exhaust smoke discharge, 5. Gas separator, 6. Smoke scrubber to take out color and odor, 7. Condenser, 8. Chimney, 9. Oil tank, 10. Synchronized gas purification, 11. Synchronized gas-recycling system, 12. Extra gas burning, 13. Heating furnace during operation, 14. Loading of material.*


#### **Table 1.**

*The engine specifications and position value.*

#### **Figure 5.**

*The liquid distillate samples from the waste plastic pyrolysis oil.*


#### **Table 2.**

*Waste plastic pyrolysis oil test fuel properties, units of measurement, test standard methods, compared to conventional diesel.*

if upgraded into a lighter compound as diesel fuel or any liquid fuel in the near future (see **Table 2**).
