Analisa Kinerja Mesin Otto Stasioner menggunakan campuran Bahan Bakar Minyak dari Pirolisis Limbah Plastik LDPE dengan Pertalite

Abstract

This study aims to utilize LDPE plastic waste, such as gallon caps, through pyrolysis to reduce waste, manage environmental pollution, and produce biogasoline as a fuel mixture for stationary Otto engines. The specific objectives include: (1) analyzing the pyrolysis results of LDPE plastic with pure gasoline at ratios of B0 (100% Pertalite), B5 (95% Pertalite: 5% Biogasoline), B15 (85% Pertalite: 15% Biogasoline), and B25 (75% Pertalite: 25% Biogasoline); (2) evaluating the performance of the Otto engine, including torque, power, specific fuel consumption, thermal efficiency, air-fuel ratio, and temperature; and (3) measuring exhaust gas emissions (CO, CO2, O2, HC). The study results show that B25 fuel has the best density of 0.753 g/ml (1.5% higher than Pertalite), the best viscosity of 0.606 mm²/s (50% higher), and the highest calorific value of 50,872 J/g (8.4% higher). The highest power was achieved with B15 at a load of 500 watts, producing 415 watts, while the best thermal efficiency was found with B5, which decreased by 2.2% compared to pure Pertalite (B0). The lowest carbon monoxide (CO) emission, 0.31%, was produced by B25 at a load of 400 watts, whereas the highest carbon dioxide (CO2) emission, 12.0%, was produced by B15 at the same load. Biogasoline from LDPE pyrolysis has the potential to be an alternative fuel with good performance and lower environmental impact. This research provides an innovative solution for managing plastic waste.