![]() The mass ratio of plastic and catalyst was 10:1. The pyrolysis process was carried out in a laboratory-scale single batch fixed bed pyrolysis reactor at the temperature of about 400 ☌ ± 30 ☌. In the present work, we tested the influence of ZAP USY zeolite on the quality and quantity of pyrolysis oils produced from high-density polyethylene, low-density polyethylene, polypropylene, and polystyrene plastic from municipal waste. The catalyst used can influence the quality of the pyrolysis products. A possible solution to reduce plastic pollution is to convert it into synthetic fuel, which can be achieved by a pyrolysis process. The use of plastic is increasing every year and is a major environmental problem. This means that the diesel engine never occurs in a condition of maximum power generated with minimum specific fuel consumption or vice versa. For both the used injector and repaired injector, the minimum specific fuel consumption (SFC) does occur at the maximum brake power (BP) not generated. The testing results found that brake power and brake thermal efficiency increase as fuel injection pressure increases, but specific fuel consumption decreases. In this research, reconditioning or repairing the used injector nozzle to increase the fuel injection pressure in the engine is one solution that can be done to improve engine performance with low maintenance costs. However, replacing a new injector nozzle carries a huge maintenance cost. If the engine is producing low power, replacing the injector nozzle with a new injector nozzle is necessary, so that engine performance reaches standard performance. ![]() Any injector problem can easily be fixed by cleaning, reconditioning, or replacement. If either of these components is clogged or damaged, it will compromise the entire performance of the engine. A typical fuel injector has two basic parts: the nozzle and the injector body. The injector is one of the main components of a diesel engine fuel system.
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