Effect of Candlenut Seed Biodiesel on Diesel Engine Emissions

Growing concern for environmental sustainability has increased interest in alternative fuels such as biodiesel. This study investigated the effect of candlenut seed biodiesel on diesel engine emissions. Biodiesel derived from candlenut oil was produced through a transesterification process and tested on a single-cylinder diesel engine with an engine speed of 1500 Rpm. The diesel engine was connected to a generator set and given an engine load using lamps with variations of 1000 watts, 2000 watts, and 3000 watts. The fuel used was a mixture of 40% candlenut seed biodiesel with 60% diesel. The results showed that at low engine loads NOx, CO2, and Opacity emissions increased, but at high engine load conditions of 3000 watts NOx emissions decreased by 34.21%, and CO2 emissions decreased by 20.24%, and Opacity decreased by 17.14% compared to using pure diesel. This research highlights the potential of candlenut seed biodiesel as a sustainable alternative fuel.