| dc.description.abstract | The depletion of petroleum reserves due to burning and its increasing demand,
environmental pollution due to plastic waste, and solutions for utilizing used
cooking oil waste have the potential to carry out research and development of
biodiesel as an alternative to replacing fossil fuels. This study aims to determine
the performance and exhaust emissions of single-cylinder direct injection diesel
engines fueled by used cooking oil biodiesel with the addition of plastic waste oil
as an additive. Performance test parameters include engine power, specific fuel
consumption (BSFC), brake thermal efficiency (BTE), and exhaust emissions (CO,
CO2, and NOx). Used cooking oil biodiesel is produced by blending crude oils in
equal volume ratios, followed by degumming, acid-catalyzed esterification, and
base-catalyzed transesterification. Meanwhile, plastic waste oil is produced by a
pyrolysis process and used as an additive in used cooking oil biodiesel with a
mixture of 5%, 10%, 15%, and 20%, which will be referred to as B+A5, B+A10,
B+A15, and B+A20. entirely without the addition of diesel. Tests were carried out
at variations of engine speeds of 1500, 1800, 2100, 2400, and 2700 rpm with a
workload of 2 kg. The calorific value of plastic waste oil is known to be close to
that of fossil fuels. When compared to biodiesel and diesel, B+A20 Power increased
by 44.4% and decreased by 25.7%. specific fuel consumption improved by 14.5%
and 34.4%, respectively, and B+A20 Thermal Brake Efficiency (BTE) improved by
39.6% and decreased by 43.09%. Meanwhile, for emission values when compared
to biodiesel and diesel, CO emissions at B+A20 fell by 16.3% and 40.4%, CO at
B+A5% decreased by 8.7% and 21.2%, CO2 emissions at B+A20 decreased 5.4%
and 3.5%, and NOx emissions at B+A5 decreased by 14.6% and 17.6%. Overall,
the performance of the B+A20 engine is predominantly close to that of diesel fuel
and facilitates the achievement of the best engine power and brake thermal
efficiency of any other blend. The resulting exhaust emissions, such as CO, CO2,
and NOx, are overall lower than those of biodiesel and diesel. | en_US |
