Analysis of exhaust gas emission on the long-term combustion of diesel engines with B20 and B100 fuel.

Understanding the decreasing availability of fossil fuels, coupled with a better awareness of the negative effects of burning fossil fuels, has made room for substitute fuels from sustainable sources. As a sustainable fuel source, biodiesel can be applied directly to diesel engines without modifying the engine. The effect of using biodiesel on diesel engines requires a more in-depth study, especially B20 and B100 fuels derived from Crude Palm oil (CPO) which have different physical and chemical characteristics from other biodiesel. Therefore, this study will determine the effect of biodiesel use on exhaust gas emissions which include emissions of carbon monoxide (CO), hydrocarbon (HC), carbon dioxide (CO₂), and smoke opacity. The fuel used was B100 (100% palm oil biodiesel) and B20 fuel (20% palm oil biodiesel+80% diesel) as a comparison. The test was carried out for 300 hours of operation, with a constant load of 4 kW halogen lamps. Based on the study results, overall engine with B100 fuel produces better emissions than engine with B20 fuel. At under no-load conditions for engines with B100 fuel, CO exhaust gas emissions were 16% lower than B20, and HC exhaust gas emission was 41% lower than B20. In contrast, at full load conditions, HC exhaust emission was 34% lower, and CO₂ exhaust gas emission was 36% lower, and the opacity of the smoke produced was 11% lower when compared to a B20 engine. [ABSTRACT FROM AUTHOR]