**2.5 Experimental procedure**


*The Influence of Exhaust Gas Recirculation on Performance and Emission Characteristics… DOI: http://dx.doi.org/10.5772/intechopen.105011*


#### **Table 3.**

*The waste pyrolysis plastic oil chemical composition.*

Using a standard orifice mechanism, an air box was fitted to the engine intake manifold system, thus enabling engine intake airflow measurements.


diesel fuel in 10%, 20%, 30%, 40% and 100%. For example, WPPO10 blend is 90% conventional diesel fuel and 10% waste plastic pyrolysis oil (WPPO) fuel in that order. Therefore, throughout this experiment, blends will be referred to as in this format WPPOB10 with digits denoting the percentage blend ratio of plastic oil by volume to conventional diesel supplied.

k.To avoid contamination, each test was conducted after a thorough evacuation procedure on the previous preceding experiment. The fuel lines and the fuel injection system mechanism were completely evacuated before a new set of experiment was initiated. This made it possible to collect good data with inputs from the test mode only, as there is no fear of contamination, poor results or error.
