Enviroeconomic Analysis of Diesel Engine, Fuelled by Waste Cooking Oil and Waste Polyethylene Co-pyrolysis Oil-Diesel Blends

This study evaluated the enviroeconmic analysis of compression ignition engines operating with neat diesel, P10D90, P20D80, and P30D70 oil blends. The liquid obtained from the co-pyrolysis of waste cooking oil and waste plastics was mixed with conventional diesel up to 30% by volume. The physiochemical property of test fuel suggests diesel-like fuel with higher calorific value, lower density ranging from 813.6 to 808.1 kg/m3, higher cetane number ranging from 55.9 to 58.2, slightly elevated kinematic viscosity ranging from 2.19 to 2.57 cSt, lower FAME content ranging from 0.48 to 0.59 V% and elevated acid value ranging from 1.4 to 3.3 mg/g KOH. To assess the environmental implication of the CI engine operating at alternative blends, the enviroeconomic approach was blends of P10D90, P20D80, and P30D70 at three load conditions (1, 2, and 3 kW). The result suggests that the lower HC and CO emission damage cost is obtained for diesel-co-pyrolysis oil blends, and the damage cost of NOX and CO2 was found to be elevated for the blends. The total emission cost revealed that conventional diesel has the lowest total damage cost. And among the P30D70 blend has the lowest damage cost, which is 6.4, 1.5, and 3.0%, slightly elevated than conventional diesel emissions damage cost at 1, 2, and 3 kW loads.