**2. The experimental set-up and equipment**

### **2.1 Introduction**

As discussed in the introduction and literature review, one of the gray areas is the fewer literature works for plastic pyrolysis oil biodiesel on EGR. The few numbers of experimental works on the waste plastic pyrolysis oil biodiesel, the interaction and influences motivate this work. Considering this trend and the level of experimental work thus far achieved, it becomes important to mount an experiment to increase and deepen understanding. Therefore, using an experimental approach aims to achieve study aims and objectives as set forth to study the effects of exhaust gas recirculation (EGR) on the performance parameters of a diesel engine, using WPPO biodiesel. **Figure 2** shows engine experimental set-up schematic diagram.

### **2.2 Experimental apparatus and equipment**

**Figure 3** shows the EGR schematic loop and definitions; 1. is the *direction of EGR gases*, 2. is the *x* subscript representing the exhaust molar gas quantity, 3. is the direction of inlet gases fresh charge, 4. is the *z* subscript representing remainder of

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

#### **Figure 2.**

*Experimental engine schematic diagram set-up.*

**Figure 3.** *The EGR modification nomenclature schematic diagram.*

the intake charge, 5. is , *nf* which is the fuel molar quantity, 6. is the EGR valve, 7. is the Rx molar gas ratio, 8. is the subscript *y* representing the inlet intake molar gas quantity, 9. is the direction of the exhaust gases exit, 10. is the engine unit.

### **2.3 Waste plastic preparation and the conversion process**

a. The waste plastic materials are acquired from a municipal solid waste management site and taken to the sorting section of the pyrolysis plant. The dust and other fine wastes collected are filtered by the cyclone filter system and disposed through a vent with a particle size monitoring system.

